Dims: 1.7" x 1.3" x 1.1"(4.3 x 3.3 x 2.8 cm)
Wt: 2.83 oz.(80.3 g) w/ box
This Aragonite specimen consists of two halves of a small geode that are lined with small, white needle-like crystals of the mineral. They do not exceed 3 mm in length, are translucent, and have a vitreous luster. In many parts of the geode's interior, these crystals appear dirty, as if someone flecked mud on them. This "mud" is actually a calcium, magnesium, manganese, iron carbonate mineral called kutnahorite. Close examination under at least 15-20x magnification shows that these "mud flecks" are actually microscopic botryoidal formations. I can only guess that at least 100x magnification would be needed to discern the individual crystals that make up these formations. The kutnahorite formations seem to have a dull luster, but there is evidence of a faint silky luster in places under a 10-power loupe. The geode's skin appears to be made of shale, and both halves are affixed inside a plastic specimen box with an adhesive putty. This specimen is perfect for one that likes to explore the world of microscopic crystals.