Barite - Specimen 1.5mm with stacked rectangular forms that

with stacked rectangular forms that create a layered

used to test and compare the hardness of unknown materials

just two bearings that stabilize the cable motion and translate it cleanly into the bit held at the front by a jocob's chuck

Approximate size of 1 tooth: 12cm x 10cm x 2

That process is what gives dioptase its famous jewel-like crystals

Barite - Specimen 1.5mm with stacked rectangular forms thatMined from: Haut Katanga or Lualaba copper belt region. Congo Description: This one of a kind Barite mineral specimen from the Congo features a long, sculptural matrix covered in honey brown to golden Barite crystals with pale translucent crystal growths throughout. The Barite forms layered bladed plates and rosette like clusters, with many thin crystals overlapping in fan shaped sprays across the top of the specimen. The earthy brown matrix gives the