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illustrating the geological processes of mineral precipitation and crystallization that contribute to its diverse colors and textures
Black Agate Resin Heart on Metal Stand
The initial layer and the surrounding minerals and conditions affect subsequent layers and give agate its wide variation in appearance
Pieces weigh approximately 3-5 kilo
Pieces measure approximately 3
Black Jasper Mushrooms / 1.5-3.5" AVG - 1 KILO LOT #1 illustrating the geological processes ofQuantity: 1 kilogram Average size range: 1. 5 to 3. 5 inches Jasper is an aggregate stone, formed from combinations of quartz, chalcedony, and other minerals that all affect the resulting colors or patterns that form. Black jasper takes its color from inclusions of chert, and aside from use in jewelry it was commonly used in Ancient Greece to streak test metals to determine purity.
