Triangular Opal Gemstone

1024 × 800

Opal Gemstone

1670 × 1290

Opalized Rock Specimen

1040 × 784

Star Sapphire Gemstone — White

2136 × 1668

green gemstone in tweezers

1391 × 1113

Black Star Sapphire

806 × 601

polished agate stone

1024 × 826

Opalescent Opal Stone

1145 × 859

polished opal stone

2016 × 1344

Opal Mineral Specimen

1024 × 768

blue and green opal gemstone

1008 × 800

Star Sapphire Gemstone — Yellow

803 × 602