A wonderful specimen of high quality dioptase crystals to 18mm from Mindouli, Congo - Brazzaville. Dioptase is strongly lustrous with a gorgeous dark emerald-green color and very sharp, well terminated crystals. The quality is superb - the crystals are gemmy at the tips with marvelous neon-green nuances. It looks better in person. In very good condition - some micro nicks. On acrylic base.

Fine dioptase!