30CTS Ethiopian Opal graduated plain rondelles.
This opal originated from a discovery made in the Menz Gishe District in the northern part of the Shewa Province. Opal from this area occurs in a wide range of body colors. Much of the opal has a brown, red, or orange body color; however, yellow, white, and clear body colors are also found.
Opal is a hydrated amorphous form of silica; its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Due to its amorphous property, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals.
This 17cm strand contains beads that are approximately 3x2mm to 8x3mm in size.
Origin : Ethiopia