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Calcite

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MNT723518

Calcite

Classic Locality

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Description
Locality: 
Alzada, Carter County, Montana, United States of America
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 5.1 × 3 cm
Description

In the late 1970s/early 1980s these specimens suddenly were abundant on the market and quite quickly disappeared again. This is a very nice example of translucent, deep red-orange calcite stalactites on what appears to be a part of a fossil from Carter County, Montana. The calcites (in the beginning referred to as aragonite - meanwhile obviously analyzed to be calcite) from Carter County are renowned for their form and color. Carter County is in the extreme southeastern part of Montana within the paleozoic Williston Basin, an area not known for fine mineral specimens. It is said that the field collector was Bud Ehrle, and that the calcite specimens came out of (a) cavern(s) in limestone. Nice and typical example.

Mineral Data
What's on the rock

Calcite

Polymorph of: 
Aragonite and Vaterite
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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Terms & Conditions

Thank you for your interest in my offers! Payment is possible via Paypal, bank transfer or cash if you pick up the item(s) personally. Bank data will be provided after settling the auction/transaction(s) if needed.

In case you are not happy with a specimen, you may send it back within 4 weeks. After receipt, i will refund the price minus shipping costs. Please inform me before sending an item back. If you have any questions (or maybe complaints) please feel free to contact me.

Best regards Roger

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