7.25" Red Spinel & Pargasite on Calcite Specimen Birthstone - Loose A Rainbow Australian Crystal Opal

A Rainbow Australian Crystal Opal in Yellow Gold

The Origin: Baja California

Green Synthetic Drop Earrings set in sterling silver

USA Shape polished rough specimen

average clarity: VS-SI

7.25" Red Spinel & Pargasite on Calcite Specimen Birthstone - Loose A Rainbow Australian Crystal OpalSpinel and Pargasite on Calcite An extraordinary sampling from the Luc Yen District of Vietnam, this 7. 25+ inch long mineral specimen exhibits more than six red spinel crystals and green pargasite crystals dispersed throughout the white calcite conglomerate matrix. Crystals are large and prominently display their iconic structures. Mineral Varieties Spinel, Pargasite, Calcite Weight (pounds) 1. 75+lbs Weight (kilograms) 0. 8kg Dimensions (inches) 7.