Black Jasper Mushrooms / 1.5-3.5" AVG - 1 KILO LOT #1 illustrating the geological processes of

illustrating the geological processes of mineral precipitation and crystallization that contribute to its diverse colors and textures

Pieces weigh approximately 3-5 kilo

despite the name is a variety of banded calcite

Natural Agate Star on Metal Base

Avg Size Range: (280 grams to 1

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.