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Rare and Antique

Friday, 27 September 2024 06:00 PM

Introducing the "Rare and Antique" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including fluorite, glaucophane, gold, granite, jamesonite, and kuksite and more from places like Elmwood mine, Smith Co., Tennessee, United States, Valley Ford, Sonoma Co., California, United States, Harvard mine, Jamestown, Tuolumne Co., California, United States, Hale's quarry, Portland, Middlesex Co., Connecticut, United States, Săcărâmb (Nagyág in Hungary), Romania, and Black Pine mine, Philipsburg, Granite Co., Montana, United States.

SOLD

Fluorite

#64706

Details
Data
Provenance
Resources

Locality: Elmwood mine, Smith Co., Tennessee, United States
Formula: CaF₂
Availability: Sold
Size: 7 x 6 x 4 cm - Sm Cabinet

Colorless Fluorite with purple rims. Nice piece with good stepped growth with sharp edges and no damage.

Fluorite

Formula: CaF₂
Crystal System: Isometric
Crystal Habit: Crystalline - Coarse, Massive - Granular, Disseminated
Cleavage: Three perfect, octahedral cleavages.
Luster: Vitreous (Glassy)
Color: purple, clear, yellow, green, red, blue
Streak: white
Geological Setting: Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments
Class: Isometric - Hexoctahedral
Fracture: Uneven
Hardness: 4

Mineralpedia: View Fluorite
On Dakota Matrix: Previously Sold Fluorite
On Dakota Matrix: Other Available Fluorite
WebMineral: View Fluorite
Mindat: View Fluorite

SOLD

Glaucophane

with Lawsonite - #64573

Details
Data
Provenance
Resources

Locality: Valley Ford, Sonoma Co., California, United States
Formula: □Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂
Availability: Sold
Size: 9 x 5 x 3.5 cm - Sm Cabinet
Special Info: Antique Specimen

Compact mass of bluish needles of Glaucophane in mass with veins of Lawsonite. Glaucophane is very similar to Holmquistite, however Holmquisite contains lithium. Both are amphiboles. It carries a Ward's label seen in the prov. tab and was deaccessioned byt the A.E. Seaman museum.

Glaucophane

Formula: [box]Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂
Crystal System: Monoclinic
Crystal Habit: Massive - Fibrous, Columnar, Granular
Cleavage: Good, Good, None
Luster: Vitreous - Pearly
Color: gray, bluish black, lavender blue, azure blue
Streak: grayish blue
Class: Monoclinic - Prismatic
Fracture: Brittle - Conchoidal
Hardness: 6-6.5

Special Info: Antique Specimen

Mineralpedia: View Glaucophane
On Dakota Matrix: Previously Sold Glaucophane
On Dakota Matrix: Other Available Glaucophane
WebMineral: View Glaucophane
Mindat: View Glaucophane

Gold

in Quartz - #64511

$275.00 - Available
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Details
Data
Provenance
Resources

Locality: Harvard mine, Jamestown, Tuolumne Co., California, United States
Formula: Au
Availability: Available
Price: $275.00
Size: 2.5 x 1.5 x 2 cm - Thumbnail
Tagged: native element

Rich specimen of Gold leaves to 1.5cm clusters in Quartz.

Gold

Formula: Au
Crystal System: Isometric
Crystal Habit: Arborescent, Platy, Granular
Cleavage: None, None, None
Luster: Metallic
Color: yellow, pale yellow, orange, yellow white, reddish white
Streak: yellow
Class: Isometric - Hexoctahedral
Fracture: Hackly
Hardness: 2.5-3

Mineralpedia: View Goldmanite
On Dakota Matrix: Previously Sold Gold
On Dakota Matrix: Other Available Gold
WebMineral: View Gold
Mindat: View Gold

SOLD

Granite

(graphic) with Microcline - #DL64719

Details
Provenance
Resources

Locality: Hale's quarry, Portland, Middlesex Co., Connecticut, United States
Availability: Sold
Size: 15 x 10 x 9 cm - Cabinet
Tagged: pegmatite rock

A good example of graphic granite. Graphic granite is basically eutectic crystallization - simultaneous growth of crystals which form at a temperature lower than the rest of the melt. In this case both the Microcline and Quartz crystallized at the same time and the Quartz grew in a large interconnected network. The Quartz crystals never completely formed full crystals but rather formed only the outer margins. The term "graphic" is derived from the Greek word “Graphos” (to write). This style of writing has wedge-like characters or letters, which the Quartz resemble in the Microcline matrix.

In the second photo you will see that the Quartz crystals shift in orientations and the length of the crystals are different. This was probably caused by two blocks being rotated while solidifying.