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Calcites
Ordering Information * * * * * * * * Return to Gems Index Page
Calcite, chemically calcium carbonate, is one of the most common mineral species. Limestone is the most common form of calcium carbonate and it is within limestone caves that calcite crystals often form. Calcium carbonate is also responsible for the creation of stalactites and stalagmites. Calcite may also form into impressive crystals like the specimens presented in the following pages.
Calcite is one of the most exciting mineral species to collect with some collectors only collect calcite. This is hardly surprising when one considers that calcite, (a) crystallizes into over 1200 different crystal forms, (b) it is commonly associated with other minerals, (c) calcite specimens may also be different colours due to the presence of trace elements and or inclusions.
| Indian calcite specimens crystallize in what is known as a "trap-rock" suite. In this, the calcite is associated with a group of hydrated aluminum silicates (known as zeolites) and has been deposited in basalt cavities by steaming aqueous solutions. | |
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G452 Clear Calcite Jalgoan, North Maharastra, India 7cm x 4.5cm x 3.5cm $10 |
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G457 Orange Calcite This orange
coloration is probably due to iron oxide impurities 7.5cm x 3cm x 3cm $16 |
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G461 Calcite crystals Nasik, India 5.5cm x 3cm x 2.5cm $15 |
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G485 Calcite with Quartz overgrowth An example of how
two common species can unite to form an intriguing and rare specimen. 15cm x 12cm $250 |
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G512 Golden Calcite Smith County, Tennessee 11.5cm x 10cm $145 |
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G549 Calcite & Fluorite & Sphalerite Smith County, Tennessee 12cm x 9cm $125 Photo 2 |
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G553 Calcite on Fluorite Smith County, Tennessee 6cm x 6cm $70 |
The Elmwood Mine Calcites are amongst the most distinctive of the species. They exhibit penetration twining where one crystal grows into another. |
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G519 Calcite & Sphalerite Elmwood Mine, Carthage, Smith Co, Tennessee 14cm x 8cm $150 |
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G522 Calcite & Fluorite on Sphalerite Elmwood Mine, Carthage, Smith Co, Tennessee 11cm x 8cm $450 Reverse Photo |
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G523 Calcite Elmwood Mine, Carthage, Smith Co, Tennessee 14cm x 8cm $75 |
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G524 Calcite on Sphalerite Elmwood Mine, Carthage, Smith Co, Tennessee 24cm x 17cm $2200 Photo 2 |
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G525 Calcite Elmwood Mine, Carthage, Smith Co, Tennessee 13cm x 8cm $250 |
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G554 Calcite Elmwood Mine, Carthage, Smith Co, Tennessee 7cm x 3.5cm $40 |
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G575 Calcite Elmwood Mine, Carthage, Smith Co, Tennessee 7cm x 7cm $95 |
Specimens from this remote locality are reasonably rare. At Nanisivik, specimens are found in the permafrost - filled cavities which are thawed out at the surface after they are collected. |
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G526 Calcite on Pyrite Nanisivik Mine, Baffin Island, Canada 8cm x 4cm $40 |
Tsumeb, Namibia has produced some of the finest rhombohedral calcite specimens in existence. |
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G526 Calcite with Duftite The rhombohedral
calcite crystal harmonizes with the green, duftite covered matrix. This combination
is characteristic of the locality. 7cm x 5cm $250 |
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G566 Calcite Tsumeb, Namibia 8cm x 8cm $500 Photo 2 |
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G574 Calcite A large decorator
piece 26cm x 8cm $750 Photo 2 |
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G576 Calcite & Fluorite Elmwood Mine, Carthage, Smith Co, Tennessee 5.5cm x 6cm $80 |
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G577 Calcite & Sphalerite Elmwood Mine, Carthage, Smith Co, Tennessee 8.5cm x 5cm $95 |
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G578 Calcite & Sphalerite Elmwood Mine, Carthage, Smith Co, Tennessee 3.5cm x 2cm $20 |
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G579 Calcite on Sphalerite & Fluorite Elmwood Mine, Carthage, Smith Co, Tennessee 5.5cm x 8cm $80 |
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G582 Calcite on Chalcopyrite Elmwood Mine, Carthage, Smith Co, Tennessee 21cm x 15cm $395 Photo 2 |
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