cluster of quartz crystals

1800 × 1474

cluster of calcite crystals

3200 × 2636

cluster of brown crystals

1060 × 795

Malachite Mineral Formation — Green

3072 × 2304

Purple Crystals — Dramatic, Photograph

1920 × 1200

hexagonal mineral crystal

4438 × 3605

Rock Formation in Cave — Brown, Dark, Photograph, Dirt

3167 × 2000

green crystal mineral specimen

2292 × 2909

Layered Rock Formation — Brown

1600 × 1200

rock formation in cave

1920 × 1200

Agate stone cross-section

1920 × 1200

Aquamarine and Tourmaline Crystals

1280 × 839