Call Us: 1-866-354-0894

M805 South Dakota Chalcedony

M805 South Dakota Chalcedony


Here is a treasure found here in the Black Hills of South Dakota, a great piece of Chalcedony. The unique specimen measures 2 1/4″ x 1″ x 1 1/2″.  It will fluoresce bright green under a SW/UV light. Make it part of your mineral collection!  

Our UV Lamps

In stock


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.


Additional information

Weight.25 lbs
Dimensions2.25 × 1.5 × 1 in

Contact Us

515 1st Street
Keystone, SD 57751

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

Find Us On Social