Dims: 5.4" x 4.5" x 3.4" (13.7 x 11.4 x 8.6 cm)
Wt: 2 lbs., 11.5 oz. (1.234 kg)
Minas Gerais, Brazil
This Quartz specimen has occurred in the form of a geode, layers of agate and druses of small crystals lining the inside of a bubble that formed in a lava flow. Only a small amount of the Quartz that coats the inside of the geode is microcrystalline in nature- most takes the form of druses of small, colorless, transparent crystals. There are two layers of these crystals, the thinner of which grew later than the thicker layer. There are a few black impurities on the smaller crystals' terminantions and some noticeable rust-staining. Portions of the geode's lava skin are missing- if one places the cut face of the geode over a bright light source, the exposed patches of agate glow brightly. I almost think that it makes a neater display that way.