Boulangerite with Calcite, Kosovo, Large Cabinet-Sized SpecimenApprox. Dimensions: 5. 76 in x 4. 97 in x 1. 5 in Approx. Weight: 896 grams The fine crystals on top of this Calcite specimen may look like hair or fiber, but they are Boulangerite, an unusual mineral that forms as flexible, interlocking patterns which often grow on other minerals. The color is dark gray atop a cream colored Calcite formation. A small, rounded cluster of white transparent Calcite crystals tops off one side of the specimen creating a

Bornite has a multicolored sheen that forms when the mineral is exposed to air creating a colorful tarnish

The two largest crystals are attached to each other at ninety-degree angles

Dimensions: 2

Some areas have a grainy texture which coats the nooks and crannies of this glowing green piece

and this specimen is blood red which gives a startling contrast to the muted gray color of the surrounding gneiss

Weight: 14 grams

Weight: 536 grams

Weight: 360 grams

Quartz the largest

Cabinet-sized piece with a slightly conchoidal shape

Two cubic crystals intersect each other in this piece to create a playful look for this little gem

Weight: 466 grams