This is an unusual Opal piece sourced directly from the miners Young Guns Opal Hunters (as seen on YouTube).

Opal Pineapples (Ikaite-Calcite-Opal) are one of the rarest mineral specimens on earth, with only a small number being unearthed whole and intact. Rare Earth Opal is the leading specialist in Opal Pineapples having unearthed all of the world’s finest examples of these specimens. This piece is from a fractured pineapple. Rare and Unique.

It is strung on tiger wire with Clear Quartz beads.