Opal - Mineral Specimen green crystal and also filter feeders

and also filter feeders

Approximate length of necklace: 18" to 20" (adjustable)

Quantity: 1 Necklace (chain included)

similar to how cave formations develop but on a mineral scale

Opal - Mineral Specimen green crystal and also filter feedersMined from: Coober Pedy, South Australia, Australia Description: This Australian opal is shown in rough form, still partially embedded in its host rock, with a mix of pale blue grey translucent silica and earthy red brown ironstone staining. The surface shows natural weathering and pitting, with areas of exposed opal displaying a waxy to slightly glassy luster. Subtle internal color shifts are visible in the cleaner sections, with faint hints of blue