green tourmaline crystal

1600 × 2667

Colorful tourmaline crystal

850 × 1139

gemstone polishing in progress

3648 × 2736

raw amethyst crystal

1024 × 778

Purple Amethyst Cluster

3072 × 2304

Polished Agate Stone — Black

800 × 600

polished agate stone

1024 × 826

Assorted Polished Stones — Black

2048 × 1536

Amethyst Crystal Cluster — Purple, Dramatic

2048 × 1536

Amethyst Crystal Cluster — Purple, Calm

2560 × 1920

purple amethyst crystal cluster

1378 × 1800

green malachite mineral specimen

2746 × 2060