Boulder Opal
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Boulder opal, 9 cm, from Winton, Queensland, Australia. Photo by Holly Smith.
Product details
Species
SizeSmall Cabinet
Dimensions9.0 cm
Added on02/13/2026
Locality
Publications
- Mineralogical Record Mineral Collecting In Texas page 81
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Mineral guide
Learn about Opal
amorphous silica with water and a spectacular play-of-color; black, boulder, and fire opal varieties capture brightness, color, and collecting appeal.Regional guide
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