Approx Weight (per Strand): 79

This makes Tsumeb dioptase highly collectible

the Zimapán mining district

It is a type of tektite

Libyan Desert Glass | Natural Impact Glass | 9 Grams | Authentic Impactite NWA 978 Approx Weight (per Strand): 79This is a rare and fantastic 9 gram Libyan Desert Glass from Kuffra, Libya, with dimensions of 28x21x18 mm. Although its exact origin is still debated, the leading theory suggests it was formed by a high energy event, such as a meteoric impact or airburst, that melted the desert sand directly where it lay, without being ejected into the atmosphere and re entering. This results in different physical characteristics compared to tektites. Libyan Desert