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South Dakota Chalcedony – Large


South Dakota Chalcedony – Large


This a larger size of a favorite here at the Rock Shed, South Dakota Chalcedony. The pieces measure approximately 1 3/4″ to 3+” in varies shapes and sizes.  A good portion of this rock has very unique and fabulous design. They are amazing as they will fluoresce a brilliant green under  SW/UV light. This material is overall good rock for the tumbler or use them as is for fountains and other decorative uses.

The MOHS Hardness Scale of 7


Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. Chalcedony 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.

Additional information

Bag Size

1lb LARGE SD Chalcedony, 2lbs LARGE SD Chalcedony, 3lbs LARGE SD Chalcedony, 5lbs LARGE SD Chalcedony

Contact Us

515 1st Street
Keystone, SD 57751

Order: 1-866-354-0894
Information: 605-666-4813

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