2012 BMC AUCTION SPECIMENS - Boston Mineral Club · Mibladen Mining District, Midelt, Khénifra...

A SAMPLER OF SELECTED

2014 BMC VOICE AUCTION SPECIMENS

Volume 2

December 2013

Albite var. Pericline w/ Chlorite & Apatite-(CaF),

Acushnet, MA

Albite - NaAlSi3O8

Dana No: 76.01.03.01

Strunz No: 09.FA.35

Apatite - Ca5(PO4)3F

Dana No: 41.08.01.01

Strunz No: 08.BN.05

Acushnet Quarry (P. J. Keating

Q., Tilcon Capaldi Q., Warren

Brothers Q., Old Bluestone Q),

Acushnet, Bristol Co., MA,

Specimen size:

24 x 17 x 6 cm., > 5000 g.

Donated by Don & Gloria Olsen Photograph by Mike Haritos

Albite was named in 1815 by Johan

Gottlieb Gahn and Jöns Jacob

Berzelius from Latin "albus", white,

alluding to its usual color.

Chlorite is a name commonly used for

undifferentiated members of the chlorite group.

While the name "chlorite" once indicated a mineral

species, it is now the name of a group of species.

Fluorite on Quartz, Xi Feng, China

Fluorite – CaF2

Dana No: 09.02.01.01

Strunz No: 03.AB.25

Yichun Mine (Mine No. 414), Yichun complex

(Yashan batholith), Yuanzhou District, Yichun

Prefecture, Jiangxi Province, China.

Light green orbs of interpenetrating Fluorite

crystals on sharp lustrous Quartz crystals

Specimen Size

Overall: 13.3 x 6.5 x 5 cm, 393 g.

Largest crystal: 3.5 cm

Donated by the East Coast Gem, Mineral &

Fossil Show

Fluorite is found as a common gangue mineral in

hydrothermal veins, especially those containing

lead and zinc minerals. It was named in 1797 by

Carlo Antonio Galeani Napione, from the Latin,

fluere = "to flow » (for its use as a flux).

Photograph by Mike Haritos

Lot of 4 Grossular Specimens, Vermont

Grossular - Ca3Al2(SiO4)3

Dana No: 51.04.03b.02

Strunz No: 09.AD.25

Belvidere Mountain Quarries (Vermont

Asbestos Group Mine; VAG Mine;

Ruberoid Asbestos Mine; Eden Mills

Quarries), Lowell & Eden, Orleans &

Lamoille Counties, VT.

4 Tn’s of Grossular garnet including

several gemmy crystals

Donated by Mike Haritos


Grossular is from the Latin grossularia

meaning "gooseberry.” Originally named

"cinnamon stone" (kanalstein] in 1803 by

Abraham Gottlieb Werner and renamed

grossularite by Werner in 1808. Named for

the green color of gooseberries (Ribes

grossularium) because the original specimens

were this color.

Fluorite, Dayu Mine, China

Fluorite – CaF2

Dana No: 09.02.01.01

Strunz No: 03.AB.25

Dayu Mine, Jiangxi Province, China

Transparent, light green, cubic crystals

with octahedral corner modifications

Specimen Size

Overall: 9.0 x 7.0 x 5.0 cm.

Largest crystal: 2.8 x 2.8 x 2.7 cm

Weight: 267 g.


In addition to being found as a common

gangue mineral in hydrothermal veins, Fluorite

is also found in some greisens, granites,

pegmatites and high-temperature veins, and

as a component of some marbles and other

metamorphic rocks.

Fluorapophyllite-(K)*, India

Fluorapophyllite-(K)*

(K,Na)Ca4(Si4O10)2F•8(H2O)

Dana No: 72.03.01.01

Strunz No: 09.EA.15

Jalgaon District, Maharashtra, India.

An aesthetic tower of colorless crystals

Specimen Size

Dimensions: 13.0 x 5.0 x 3.5 cm

Weight: 148 g.

Donated by Zeolites India


Apophyllite was named in 1806 by Rene Just Haüy from

the Greek for "away from" (ἀπό, apo) and "leaf"

(φύλλον, phyllos), in allusion to the way it exfoliates upon

heating.

*Apophyllite-(KF)-Apophyllite-(KOH) Series. The name

was revised from apophyllite-(KF) to fluorapophyllite-(K)

(Hatert et al,European Journal of Mineralogy 25, 2013).

Fluorapatite Crystals, Brazil

Fluorapatite - Ca5(PO4,CO3)3F

Dana No: 41.08.01.04

Strunz No: 08.BN.05

Sapo Mine, Ferruginha, Conselheiro

Pena, Doce Valley, Minas Gerais, Brazil

Tabular crystals have a lustrous, dark

green color with some internal zoning.

Specimen Size: 3.0 x 2.5 x 2.4 cm., 128 g

Donated by the East Coast Gem, Mineral

& Fossil Show

The name Apatite is derived from the Greek απατείν ("apatein"), "to deceive" or "to be misleading", as Apatite was often confused with other minerals (e.g. Beryl, Milarite).

Photograph by

Mike Haritos

Fluorapatite is the most common species in the apatite group. It occurs in most igneous rocks, during initial phases of paragenesis, as an accessory mineral, often in microscopic crystals, and may occur as very large bodies as late-magmatic segregations in alkaline igneous rocks. Also occurs crystallized in pegmatitic facies of acidic and basic types of igneous rocks. Common in magnetite deposits, and in hydrothermal veins, particularly those formed at high temperatures, and in Alpine cleft-type veins.

Quartz, Pakistan

Quartz - SiO2

Dana No: 75.01.03.01

Strunz No: 04.DA.05

Dara Ismael Khan District, South

Waziristan, Federally Administered Tribal

Areas (FATA), Pakistan.

A clear, complex crystal

Specimen Size: 8.0x 4.4 x 3.7 cm., 77 g.

Donated by the East Coast Gem, Mineral

& Fossil Show


The word "quartz" is derived from the German

word "Quarz" and its Middle High German

ancestor "twarc", which probably originated in

Slavic (cf. Czech tvrdý ("hard"), Polish twardy

("hard")).

Quartz is the most common mineral found on

the surface of the Earth. It is a natural form

of silicon dioxide.

An Italian Pietra Dura Plaque -Florence, Italy

Pietra Dura Plaque

Made in Florence, Italy

Frame Dimensions:

14.5 x 11.0 cm x 1.5 cm

Donated by Dr. Bernie Wuench


Pietra dura or pietre dure, is a term for the

inlay technique of using cut and fitted,

highly-polished colored stones to create

images. It is considered a decorative art. It

first appeared in Rome in the 16th century,

reaching its full maturity in Florence.

After the work is assembled loosely, the stonework is glued stone-by-stone to a substrate after having previously been "sliced and cut in different shape sections; and then assembled together so precisely that the contact between each section was practically invisible". Stability was achieved by grooving the undersides of the stones so that they interlocked, like a jigsaw puzzle, with everything held in place by an encircling 'frame'. Many different colored stones, particularly marbles, were used, along with semiprecious, and even precious stones. Pietra dura items are generally crafted on green, white or black marble base stones. Typically the resulting panel is completely flat.

Prehnite on Epidote, Mali

Prehnite - Ca2Al2Si3O10(OH)2

Dana No: 72.01.03.01

Strunz No: 09.DP. 20

Epidote - Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH)

Dana No: 58.2.1a.7

Strunz No: 9.BG.05a

Djouga diggings (Jjouga; Djouga-Kolon),

Bendougou village (Bendoukou village;

Benduko village), Arrondissement Diako,

Bafoulabé Circle, Kayes Region, Mali.

A spectacular orb of Prehnite on terminated

Epidote crystals

Specimen Size: 8.0 x 5.2 x 5.0 cm., 201 g.

Donated by the East Coast Gem, Mineral &

Fossil Show Photograph by Mike Haritos

Prehnite was named after the Dutch Colonel, Hendrik von Prehn (1733-1785), governor of the Dutch colony at the Cape of Good Hope, South Africa. He also was a naturalist & mineral collector and is credited with discovering the mineral in 1774.

Tourmaline, Minas Gerais, Brazil

Most likely Elbaite or Liddicoatite

Elbaite - Na(Li, Al)3Al6(BO3)3Si6O18(OH)4

− Dana No: 61.03d.01.08

− Strunz No: 09.CK.05

Liddicoatite - Ca(Li, Al)3Al6(BO3)3Si6O18(O,OH,F)4

− Dana No: 61.03b.01.02

− Strunz No: 09.CK.05

Barra de Salinas, Coronel Murta, Jequitinhonha

Valley, Minas Gerais, Brazil.

Specimen Size: 3.5 x 1.9 x 1.8 cm. , weight: 13 g.

The crystal has a high luster, a most complex

termination and has sections of a deep green color.

Formerly in the personal collection of Luis Menezes

Donated by the East Coast Gem, Mineral & Fossil

Show


Tourmaline (synonymous with tourmaline group) comprises trigonal borosilicates of the cyclosilicate superclass. The nomenclature was recently revised (Henry et al., American Mineralogist, 2011).

Sphalerite, Pyrite, Dolomite

Sphalerite - (Zn,Fe)S

Dana No: 02.08.02.01,

Strunz No: 02.CB.05a

Pyrite - FeS2

Dana No: 02.12.01.01,

Strunz No: 02.EB.05a

Dolomite - CaMg(CO3)2

Dana No: 14.02.01.01,

Strunz No: 05.AB.10

Specimen Size:

25.0 x 15.0 x 12.2 cm., 5443.1 g

A second generation of gemmy “Ruby

Jack” sphalerite crystals are sprinkled

around the specimen.

Pyrite is coating the larger sphalerite xls.



Sphalerite, also known as Blende or Zinc Blende, is the major ore of zinc. When pure (with little or no iron) it forms clear crystals with colours ranging from pale yellow (known as Cleiophane) to orange and red shades (known as Ruby Blende), but as iron content increases it forms dark, opaque metallic crystals (known as Marmatite)

Galena & Sphalerite, Romania

Galena - PbS

Dana No: 02.08.01.01

Strunz No: 02.CD.10


Dana No: 02.08.02.01,


Cavnic Mine (Kapnikbánya), Cavnic

(Kapnic; Kapnik), Maramureș Co.,

Romania.

Specimen Size:

9.5 x 7.5 x 3.3 cm., weight: 908 g.


Photograph by

Mike Haritos

Sphalerite, also known as Blende or Zinc Blende, was named in 1847 by Ernst Friedrich Glocker from the Greek σφαλεροζ "sphaleros" = treacherous, in allusion to the ease with which dark varieties were mistaken for galena, but yielded no lead. Originally called blende in 1546 by Georgius Acricola (Georg Bauer). It also was known by a variety of chemical-based names subsequent to Agricola and before Glocker including "zincum”.

Galena was named by Pliny the Elder in 77-79 from the Greek "galene" meaning lead ore.

Vanadinite, Morocco

Vanadinite - Pb5(VO4)3Cl

Dana No: 41.08.04.03

Strunz No: 08.BN.05

Mibladen Mining District, Midelt,

Khénifra Province, Meknès-Tafilalet

Region, Morocco.

Specimen Size:

Dimensions: 7.0 x 6.5 x 2.4 cm.,

Weight: 91 g.

Well developed hexagonal prisms

with smooth faces and sharp edges.

The crystals have a nice relief.


Vanadinite is a secondary lead chlorovanadate. It is almost always found in the oxidation zone

of lead deposits in arid climates resulting from the alteration of vanadiferous sulphides and

silicates of the gangue and wall rocks.

Stilbite-Ca, Nova Scotia, Canada

Stilbite-Ca

NaCa4[Al8Si28O72]•n(H2O) (n=28-32)

Dana No: 77.01.04.03

Strunz No: 09.GE.10

Wasson Bluff (Wasson's Bluff),

Parrsboro, Cumberland Co., Nova

Scotia, Canada.

Specimen Size:


Weight: 242 g.



Named in 1797 by Jean Claude de la

Métherie from Greek στιλβη "stilbein", to

glitter of shine, or "stilbe", a mirror, alluding

to its pearly or vitreous luster. Additional

varietal names and synonyms have been

proposed: blättricher zeolit, hypostilbite,

puflerite, radiated zeolite, and syhedrite.

Chemical suffixes were added by the IMA.

Calcite, Quartz & Pyrite, Kosovo

Calcite - CaCO3

Dana No: 14.01.01.01

Strunz No: 05.AB.05

Quartz – SiO2

Dana No: 75.01.03.01

Strunz No: 04.DA.05

Pyrite – FeS2

Dana No: 02.12.01.01


Trepča Stan Terg Mine (Stari Trg Mine;

Trepča Mine; Stan Trg Mine), Trepča

complex, Trepča valley, Kosovska

Mitrovica, Kosovo.

Specimen Size:


Weight: 237 g.

Calcite crystals have a luminescent

luster.


Pyrite was named in antiquity from the Greek

"pyr" for "fire", because sparks flew from it

when hit with another mineral or metal.

Lot of Three Quartz Crystals, Fonda, NY

Quartz - SiO2

Dana No: 75.01.03.01

Strunz No: 04.DA.05

Diamond Acres (Hastings Farm),

Fonda, Mohawk Township,

Montgomery Co., New York, USA.

3 “Herkimer Diamond” Thumbnails



Herkimer diamonds are a variety of quartz crystals from Herkimer, Co. New York that have been popular with collectors for more than 100 years. They are frequently doubly terminated with prism faces about as prominent as the pyramidal terminations. Various localities for them in Herkimer Co. are still producing many specimens each year even though it requires a hard manual labor to find good specimens. The Boston Mineral Club has a claim at Diamond Acres that members can work to collect their own specimens

Malachite, Democratic Republic of Congo

Malachite - Cu2(CO3)(OH)2

Dana No: 16a.03.02.01

Strunz No: 05.BA.10

L'Etoile du Congo Mine (Star of

the Congo Mine; Kalukuluku

Mine), Lubumbashi

(Elizabethville), Katanga Copper

Crescent, Katanga (Shaba),

Democratic Republic of Congo

(Zaïre).

Specimen Size:


Weight: 181 g


Malachite is a green, very common

secondary copper mineral with a widely

variable habit. It was named “molochitus”

in antiquity (see Pliny the Elder, 79 CE)

after the Greek μαλαχή, "mallows," in

allusion to the green color of the leaves.

Quartz, Sphalerite & Pyrite, Mexico

Quartz - SiO2

Dana No: 75.01.03.01

Strunz No: 04.DA.05


Dana No: 02.08.02.01,


Pyrite - FeS2

Dana No: 02.12.01.01


Mexico

Specimen Size: 14.5 x 9.8 x 5.3 cm., 568 g.

Donated by STONETRUST


Sphalerite, also known as Blende or Zinc Blende, was named in 1847 by Ernst Friedrich Glocker from the Greek σφαλεροζ "sphaleros" = treacherous, in allusion to the ease with which dark varieties were mistaken for galena, but yielded no lead. Pyrite was named in antiquity from the Greek "pyr" for "fire", because sparks flew from it when hit with another mineral or metal.

Calcite, Mexico

Calcite – CaCO3

Dana No: 14.01.01.01

Strunz No: 05.AB.05

Santa Eulalia District, Mun. de Aquiles

Serdán, Chihuahua, Mexico.

Sharp step-faced crystals

Specimen Size:

Dimensions: 6.8 x4.5 x 2.9 cm.,

Weight: 60g.


The mineral Calcite was named in ancient

times by Gaius Plinius Secundus (Pliny

the elder) in 79. The name is derived

from Calx, Latin for Lime.

Quartz, Greece

Quartz (SiO2), with Hedenbergite

inclusions (?)

Dana No: 75.01.03.01

Strunz No: 04.DA.05

Serifos Island (Seriphos), Cyclade

Islands (Cyclades; Kikladhes; Nomos

Kikladhon), Kykládes Prefecture,

Aegean Islands Department (Aiyaíon),

Greece.

Donated by STONETRUST


The term prase is used to describe lustrous, cigar- and spear-shaped quartz crystals with green inclusions. The prase found on Serifos Island, in Greece, is considered by many to be the best in the world. The color of prase is caused by various green inclusions that are evenly distributed throughout the interior of the crystals. The most common inclusions seem to be fibrous amphibole minerals like actinolite, or the pyroxene mineral hedenbergite.

Fluorapophyllite-(K)* & Stilbite, India

Fluorapophyllite-(K)*

(K,Na)Ca4(Si4O10)2F•8(H2O)

Dana No: 72.03.01.01

Strunz No: 09.EA.15

Stilbite

NaCa4[Al8Si28O72]•n(H2O) (n=28-32)

Dana No: 77.01.04.03

Strunz No: 09.GE.10

Lonavale (Lonavala), Pune District

(Poonah District), Maharashtra, India.

Specimen Size:

8.2 x 7.9 x 5.0 cm., weight: 267 g.

Choice green Apophyllite xls. with

highly lustrous white Stilbite xls. Photograph by

Mike Haritos

Stilbite is from Greek "stilbein", to glitter of shine, or "stilbe", a mirror, alluding to its pearly or vitreous luster. Apophyllite was named in 1806 by Rene Just Haüy from the Greek for "away from" (ἀπό, apo) and "leaf" (φύλλον, phyllos), in allusion to the way it exfoliates upon heating.

Calcite, Kansas

Calcite – CaCO3

Dana No: 14.01.01.01

Strunz No: 05.AB.05

Blue Moon Mine, Galena, KS

Note: mindat lists the Blue Moon Mine as

in Oklahoma

Specimen Size:

Dimensions: 17.5 x 6.4 x 5.4 cm.

Weight: 722 g

A large single crystal exhibiting

twinning at the termination



The mineral Calcite was named in ancient

times by Gaius Plinius Secundus (Pliny

the elder) in 79. The name is derived

from Calx, Latin for Lime.

Lot of Three Quartz Crystals, New Mexico

Quartz - SiO2

Dana No: 75.01.03.01

Strunz No: 04.DA.05

White Mountain Wilderness, Lincoln

Co., New Mexico

Three gemmy xls. showing included

phantom growths.

Specimen Sizes:

A) 4.5 x 1.8 x 1.3 cm.

B) 3.5 x 1.1 x 0.9cm.

C) 3.5 x 0.7 x 0.6 cm.

Donated by Mike Haritos Photograph by Mike Haritos

Quartz has been known and appreciated since pre-historic times. The most ancient name known is recorded by Theophrastus in about 300-325 BCE, κρύσταλλος or kristallos. The varietal names, rock crystal and bergcrystal, preserve the ancient usage. The root words κρύοσ signifying ice cold and στέλλειυ to contract (or solidify) suggest the ancient belief that kritallos was permanently solidified ice.

Fluorite on Dolomite, China

Fluorite – CaF2

Dana No: 09.02.01.01

Strunz No: 03.AB.25

Dolomite - CaMg(CO3)2

Dana No: 14.02.01.01

Strunz No: 05.AB.10

Shangbao Mine, Leiyang Co.,

Hengyang Prefecture, Hunan

Province, China.

Specimen Size:


Weight: 252 g.

Donated By, East Coast Gem,

Mineral, and Fossil Show

Photograph by

Mike Haritos

The term fluorescence is derived from fluorite, which will often, but not always, exhibit this effect. Trace amounts of Rare earth elements (REEs) are often an activator of fluorescence in fluorite.

Calcite, Oklahoma

Calcite – CaCO3

Dana No: 14.01.01.01

Strunz No: 05.AB.05

Tri-State District, Ottawa Co.,

Oklahoma, USA.

Specimen Size


Weight: 1076 g

Nice parallel xl. Growth

Donated by Nathan Martin


Calcite is an important rock forming mineral. It forms in sedimentary deposits as limestone, can be regionally or contact metamorphosed into marbles and rarely forms igneous rocks (carbonatites). It also is a common gangue mineral in hydrothermal deposits. Calcite is highly variable in color and crystal forms, but it is most easily recognized by its reactivity to acids, even weaker acids like vinegar.

Lot of 4 Smoky Quartz Crystals, Switzerland

Quartz var. Smoky - SiO2

Dana No: 75.01.03.01

Strunz No: 09.FA.30

Gotthard Oberalp Area, Uri,

Switzerland.

4 Gemmy Thumbnails when held to

the light.



The word "quartz" is derived from the

German word "Quarz" and its Middle High

German ancestor "twarc", which probably

originated in Slavic (cf. Czech tvrdý ("hard"),

Polish twardy ("hard")).

Quartz is the most common mineral found on

the surface of the Earth. It is a natural

form of silicon dioxide.

Manganese Nodule

A concretion of several complex

manganese-iron minerals.

17% manganese, 10% iron, 0.6 % nickel, 0.1%

copper and 0.29% of cobalt plus smaller

fractions of lead, titanium, vanadium and

strontium.

Blake Plateau off the S.E. Coast of the U.S.

Found at a depth of approximately 900 m (3000

ft.)

A very rare item!


Photograph by Mike Haritos Manganese nodules, are rock concretions on the sea

bottom formed of concentric layers of iron and manganese hydroxides around a core. The core may be microscopically small and is sometimes completely transformed into manganese minerals by crystallization. Nodules vary in size from tiny particles to large pellets more than 20 cm (8 in) across. However, most nodules are between 5 and 10 cm (2 and 4 in) in diameter, about the size of potatoes.

The magnesium-iron-manganese amphibole subgroup is one of the subgroups belonging to the W(OH,F,Cl) amphibole group. It is defined with Mg,Fe,Mn as the dominant element in the X position ( = IMA B position.)

Half Quartz Geode with Amethyst Crystals, Brazil

Quartz - SiO2

Dana No: 75.01.03.01

Strunz No: 04.DA.05

Minas Gerais, Brazil

Banded Agate with Amethyst

crystals in the center

Cut and polished

Specimen size:


Weight: 2864 g.

Anonymous Donor


Quartz crystals in geodes are formed

by a multistage process. Groundwater or

hydrothermal waters scavenge silica as

they percolate through sediments,

sedimentary rocks, lavas, or

volcaniclastic rocks. The geodes found in

Minas Gerais typically formed in gas

cavities in basalt lavas.

Long Wave (LW) & Short Wave (SW) UV Source

AC-powered source of Ultraviolet (UV) radiation

suitable for checking mineral specimens for

fluorescence



Ultraviolet (UV) radiation is defined as that portion of the electromagnetic spectrum with wavelengths between x rays and visible light, i.e., between 40 and 400 nm. The UV spectrum is divided into Vacuum UV (40-190 nm), Far UV (190-220 nm), UVC or SW UV (220-290 nm), UVB or MW UV (290-320), and UVA or LW UV (320-400 nm). The notations LW, MW, and SW are most often used by mineralogists, with the bands generally centered around the mercury gas emission lines of 365nm, 311nm, and 254nm. Fluorescence is luminescence caused by electromagnetic radiation. Over 500 of the more than 3600 known mineral species are known to fluoresce visibly in at least some specimens. Most minerals do not fluoresce when pure. It takes certain impurities in certain quantities to make the mineral fluoresce. Such impurities are called "activators".

2012 BMC AUCTION SPECIMENS - Boston Mineral Club · Mibladen Mining District, Midelt, Khénifra...

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Transcript of 2012 BMC AUCTION SPECIMENS - Boston Mineral Club · Mibladen Mining District, Midelt, Khénifra...