4.5-8mm Schalenblende plain rondelles 8 inch 47 beads AA rare

Schalenblende plain rondelle beads present as an opaque banded formation polished to reveal concentric Sphalerite and Wurtzite with metallic areas of Galena. Schalenblende consists of alternating bands of brown-yellow sphalerite, brunckite and wurtzite, and lustrous galena. Sphalerite and Wurtzite are fluorescent in UV light. These beads are symmetrical and have bountiful areas of metallic grey and banded golden yellow and brown hues. AA Rare gemstone mined in Poland