Precious-opal (4.2 x 3.1 x 2.6 cm)

Description

Formula: SiO₂ · nH₂O

System: Mineraloid

Locality: South Wello, Amhara Province, Ethiopia

Habit: Opalescence with rainbow spectrum

Color: From pale green to yellow orange opalescence

Luster: Vitreous luster

Weight: 29 g

Dimensions: 4.2 x 3.1 x 2.6 cm