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caddisfly (Trichoptera)
as half of the gem is off-white non-included Quartz
the specimens from the Knappenwand are too dark to see any color
Both twins are actually doubly terminated
this attractive three-dimensional “mound” of black “Marmatite” Sphalerite is comprised of sharp
Dioptase on Calcite Brookite caddisfly (Trichoptera)When it comes to Dioptase, there is no locality greater or more prolific than Tsumeb for quantity and quality. The finest Tsumeb Dioptase specimens are simply breathtaking, and now in very short supply on the market. This specimen exhibits the top emerald green color (impossible to replicate in photos) that made these specimens so famous. Sharp, very lustrous, well formed, trigonal crystals sit beautifully in a crystallized "ridge" on classic
