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M817 South Dakota Chalcedony

M817 South Dakota Chalcedony

$18.00

M817: South Dakota Chalcedony – Locality: South Dakota.  Selection: Rough specimen.

Appearance:  A treasure found here in the Black Hills of South Dakota. It will fluoresce bright green color under a SW/UV light.

Please Note: display photos are shot under various light settings.

Approximate measurements: LxWxH –   6″ x 1 7/8″ x 3 1/2″.

Availability: single specimen, exclusive. 

Our UV Lamps

In stock

Description

Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. It has a waxy luster and may be semitransparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black.

 

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515 1st Street
Keystone, SD 57751

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