Purple mineral specimen with black crystals

3048 × 1744

Red and Black Mineral Cluster

1800 × 1276

Blue and White Mineral Cluster — Dramatic

3630 × 2482

Red Mineral Specimen

800 × 600

Gold Crystals on Rock

1239 × 1024

Blue Fluorite Crystals — Mineralogical

2048 × 1360

Yellow Crystal Cluster

2256 × 1504

fluorescent blue crystals

4288 × 2848

Black Crystals on Rock

1280 × 878

green crystals on white matrix

1457 × 1500

Mineral specimen with crystals

2647 × 1845

Yellow Crystals on Rock

800 × 600