Polished Agate Druzy Hearts / 2.5-4.5" AVG - 1 KILO LOT Menu Freeforms which comes from small amounts

which comes from small amounts of manganese in the crystal

5 to 5 inches)

but instead a kind of glass that forms when volcanic lava rapidly cools in the open air without forming any specific crystalline structures

Genuine Moldavite specimens are very scarce

Polished Agate Druzy Hearts / 2.5-4.5" AVG - 1 KILO LOT Menu Freeforms which comes from small amountsQuantity: 1 kilogram Average size range: 2. 5 to 4. 5 inches Agate is a banded variety of chalcedony that forms inside pockets of metamorphic and volcanic rock, with the initial layer that forms and the surrounding minerals and conditions affecting subsequent layers and giving agate its wide variation in appearance. Agate can also bond with quartz crystal while forming, which can lead to distinctive white banding and exposed crystal druzy.