Pink Opal Sphere (1 Piece) Menu Rough Stones is formed when ancient coral

is formed when ancient coral becomes fossilized and later undergoes agatization

Pieces measure approximately

and is normally white or colorless with thin black veins

lepidocrocite

The fossils for these species are so widespread that paleontologists and geologists use them as index fossils to determine when rock layers formed

Pink Opal Sphere (1 Piece) Menu Rough Stones is formed when ancient coralPink Opal Sphere Uniqueness Guaranteed: Every item is one of a kind, making them ideal for all projects or designs. The listing is for (1 Sphere) Avg Size Range: (55 to 65 millimeters) Sizes Vary Opal is a gemstone featuring high water content, and it can form inside sedimentary or volcanic rock and even some ores like limonite. Pink opal is a variety of common opal, meaning it does not have the opalescence or play of color that precious opal does.