AltGems
Updated as of June 2026

All gemstone guides

Search 112 stones by name or color, sort by price or hardness, and open any guide for meaning, price, care, and buying advice.

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6.8

Amethyst

Purple · Mohs 7 · $5+/ct7.4

Moissanite

Colorless · Mohs 9.25 · $200+/ct7.2

Lab-Grown Diamond

Colorless · Mohs 10 · $400+/ct7.8

Sapphire

Blue · Mohs 9 · $50+/ct7.8

Ruby

Red · Mohs 9 · $100+/ct6.8

Emerald

Green · Mohs 7.5 · $100+/ct4.6

Opal

White · Mohs 5.75 · $10+/ct6.6

Citrine

Yellow · Mohs 7 · $5+/ct7.0

Garnet

Red · Mohs 7 · $10+/ct6.8

Topaz

Blue · Mohs 8 · $10+/ct6.8

Peridot

Green · Mohs 6.75 · $20+/ct6.8

Aquamarine

Blue · Mohs 7.75 · $30+/ct6.2

Tanzanite

Blue · Mohs 6.5 · $100+/ct5.2

Moonstone

White · Mohs 6 · $5+/ct5.4

Labradorite

Gray · Mohs 6 · $3+/ct8.4

Diamond

Colorless · Mohs 10 · $1,000+/ct7.0

Morganite

Pink · Mohs 7.75 · $20+/ct6.0

Kunzite

Pink · Mohs 6.75 · $20+/ct7.4

Spinel

Red · Mohs 8 · $50+/ct8.0

Alexandrite

Green · Mohs 8.5 · $500+/ct7.8

Zircon

Blue · Mohs 7.5 · $20+/ct6.8

Iolite

Blue · Mohs 7 · $15+/ct6.0

Chrysoprase

Green · Mohs 6.75 · $5+/ct5.8

Carnelian

Orange · Mohs 6.75 · $3+/ct5.8

Agate

Multicolor · Mohs 6.75 · $2+/ct5.4

Jasper

Brown · Mohs 6.75 · $2+/ct5.4

Onyx

Black · Mohs 6.75 · $3+/ct5.2

Jade

Green · Mohs 6.75 · $20+/ct4.8

Lapis Lazuli

Blue · Mohs 5.5 · $5+/ct4.4

Malachite

Green · Mohs 3.75 · $3+/ct4.8

Turquoise

Blue · Mohs 5.5 · $5+/ct4.2

Pearl

White · Mohs 2.75 · $5+/ct6.6

Rose Quartz

Pink · Mohs 7 · $2+/ct6.6

Smoky Quartz

Brown · Mohs 7 · $3+/ct5.2

Rhodonite

Pink · Mohs 6 · $3+/ct4.6

Rhodochrosite

Pink · Mohs 3.75 · $5+/ct5.6

Sunstone

Orange · Mohs 6.25 · $10+/ct7.2

Spessartite Garnet

Orange · Mohs 7 · $50+/ct7.0

Tsavorite Garnet

Green · Mohs 7 · $100+/ct7.2

Demantoid Garnet

Green · Mohs 6.75 · $200+/ct6.6

Ametrine

Purple · Mohs 7 · $10+/ct4.8

Fluorite

Purple · Mohs 4 · $2+/ct5.0

Apatite

Blue · Mohs 5 · $5+/ct4.8

Sodalite

Blue · Mohs 5.75 · $2+/ct4.8

Hematite

Black · Mohs 5.75 · $1+/ct5.2

Pyrite

Gold · Mohs 6.25 · $1+/ct4.6

Obsidian

Black · Mohs 5.25 · $1+/ct4.4

Amber

Yellow · Mohs 2.25 · $5+/ct4.6

Coral

Red · Mohs 3.5 · $5+/ct5.4

Tiger's Eye

Brown · Mohs 6.75 · $2+/ct5.8

Aventurine

Green · Mohs 6.75 · $2+/ct5.4

Prehnite

Green · Mohs 6.25 · $3+/ct5.4

Larimar

Blue · Mohs 5 · $10+/ct6.0

Kyanite

Blue · Mohs 6 · $5+/ct6.6

Andalusite

Brown · Mohs 7.25 · $20+/ct6.4

Sphene

Green · Mohs 5.25 · $20+/ct6.4

Chrome Diopside

Green · Mohs 5.75 · $10+/ct7.0

Paraiba Tourmaline

Blue · Mohs 7.25 · $1,000+/ct7.0

Tourmaline

Green · Mohs 7.25 · $20+/ct8.0

Padparadscha Sapphire

Orange · Mohs 9 · $500+/ct7.8

White Sapphire

Colorless · Mohs 9 · $40+/ct7.8

Black Diamond

Black · Mohs 10 · $200+/ct5.4

Bloodstone

Green · Mohs 6.75 · $3+/ct6.0

Chalcedony

Blue · Mohs 6.75 · $3+/ct5.2

Amazonite

Green · Mohs 6.25 · $2+/ct7.8

Chrysoberyl

Yellow · Mohs 8.5 · $50+/ct7.0

Heliodor

Yellow · Mohs 7.75 · $20+/ct7.0

Rubellite

Pink · Mohs 7.25 · $30+/ct7.0

Indicolite

Blue · Mohs 7.25 · $40+/ct6.8

Green Amethyst

Green · Mohs 7 · $5+/ct7.0

Goshenite

Colorless · Mohs 7.75 · $10+/ct7.0

Rhodolite Garnet

Purple · Mohs 7.25 · $20+/ct6.8

Imperial Topaz

Orange · Mohs 8 · $100+/ct7.6

Cubic Zirconia

Colorless · Mohs 8.25 · $1+/ct5.8

Hiddenite

Green · Mohs 6.75 · $20+/ct6.8

Blue Topaz

Blue · Mohs 8 · $10+/ct7.0

Goshenite

Colorless · Mohs 7.75 · $10+/ct7.0

Red Beryl

Red · Mohs 7.75 · $2,000+/ct7.0

Euclase

Blue · Mohs 7.5 · $100+/ct6.6

Benitoite

Blue · Mohs 6.5 · $800+/ct7.4

Taaffeite

Purple · Mohs 8 · $1,500+/ct6.6

Grandidierite

Green · Mohs 7.5 · $500+/ct5.2

Sugilite

Purple · Mohs 6 · $20+/ct4.8

Charoite

Purple · Mohs 5.5 · $10+/ct4.4

Variscite

Green · Mohs 4.5 · $10+/ct4.4

Lepidolite

Purple · Mohs 3 · $5+/ct4.4

Celestite

Blue · Mohs 3.25 · $5+/ct6.8

Danburite

Colorless · Mohs 7 · $20+/ct5.8

Scapolite

Yellow · Mohs 6 · $20+/ct5.8

Dumortierite

Blue · Mohs 7 · $5+/ct4.2

Howlite

White · Mohs 3.5 · $3+/ct5.4

Unakite

Green · Mohs 6.5 · $3+/ct4.0

Chrysocolla

Blue · Mohs 3 · $5+/ct5.6

Sphalerite

Orange · Mohs 3.75 · $20+/ct4.0

Seraphinite

Green · Mohs 2.5 · $10+/ct6.0

Thulite

Pink · Mohs 6.5 · $5+/ct7.0

Zoisite

Green · Mohs 6.5 · $10+/ct6.0

Vesuvianite

Green · Mohs 6.5 · $15+/ct6.0

Axinite

Brown · Mohs 6.75 · $20+/ct5.2

Hackmanite

Pink · Mohs 5.75 · $15+/ct5.0

Hemimorphite

Blue · Mohs 5 · $10+/ct6.2

Blue Lace Agate

Blue · Mohs 7 · $3+/ct5.8

Ocean Jasper

Green · Mohs 7 · $3+/ct5.8

Mookaite

Red · Mohs 7 · $3+/ct4.2

Angelite

Blue · Mohs 3.5 · $5+/ct5.2

Larvikite

Black · Mohs 6.25 · $3+/ct5.2

Dioptase

Green · Mohs 5 · $30+/ct4.2

Shungite

Black · Mohs 3.5 · $3+/ct4.0

Jet

Black · Mohs 3 · $5+/ct5.0

Cavansite

Blue · Mohs 3.5 · $20+/ct5.8

Epidote

Green · Mohs 6.5 · $10+/ct4.8

Goldstone

Brown · Mohs 5.5 · $2+/ct
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