5.18g Dioptase Crystal Cluster from Congo MineralSpecimen It has a deep green

It has a deep green color with a good change in daylight

Beautiful Doubly Terminated clear quartz crystal

Treatment: Heat

these specimens do oxidize so the weight can vary slightly

but this piece is very fine cutting material that will have a good yield

5.18g Dioptase Crystal Cluster from Congo MineralSpecimen It has a deep greenThis is an amazing thumbnail sized dioptase crystal cluster. This piece has a beautiful deep blueish green color and great crystal structure. The crystal terminations are fairly gemmy, too (when back lit). We consider this piece to be a Thumbnail (TN) sized mineral specimen. Locality: D. R. Congo Measurements: 20. 4mm x 18mm x 13. 3mm Weight: 5. 18 grams