AltGems
Updated as of June 2026

Gemstone jewelry guides

Choose a jewelry type, search for a stone, and open its guide for styles, cost, and the best metals.

Amethyst

Purple · Mohs 7

Moissanite

Colorless · Mohs 9.25

Lab-Grown Diamond

Colorless · Mohs 10

Sapphire

Blue · Mohs 9

Ruby

Red · Mohs 9

Emerald

Green · Mohs 7.5

Opal

White · Mohs 5.75

Citrine

Yellow · Mohs 7

Garnet

Red · Mohs 7

Topaz

Blue · Mohs 8

Peridot

Green · Mohs 6.75

Aquamarine

Blue · Mohs 7.75

Tanzanite

Blue · Mohs 6.5

Moonstone

White · Mohs 6

Labradorite

Gray · Mohs 6

Diamond

Colorless · Mohs 10

Morganite

Pink · Mohs 7.75

Kunzite

Pink · Mohs 6.75

Spinel

Red · Mohs 8

Alexandrite

Green · Mohs 8.5

Zircon

Blue · Mohs 7.5

Iolite

Blue · Mohs 7

Chrysoprase

Green · Mohs 6.75

Carnelian

Orange · Mohs 6.75

Agate

Multicolor · Mohs 6.75

Jasper

Brown · Mohs 6.75

Onyx

Black · Mohs 6.75

Jade

Green · Mohs 6.75

Lapis Lazuli

Blue · Mohs 5.5

Malachite

Green · Mohs 3.75

Turquoise

Blue · Mohs 5.5

Pearl

White · Mohs 2.75

Rose Quartz

Pink · Mohs 7

Smoky Quartz

Brown · Mohs 7

Rhodonite

Pink · Mohs 6

Rhodochrosite

Pink · Mohs 3.75

Sunstone

Orange · Mohs 6.25

Spessartite Garnet

Orange · Mohs 7

Tsavorite Garnet

Green · Mohs 7

Demantoid Garnet

Green · Mohs 6.75

Ametrine

Purple · Mohs 7

Fluorite

Purple · Mohs 4

Apatite

Blue · Mohs 5

Sodalite

Blue · Mohs 5.75

Hematite

Black · Mohs 5.75

Pyrite

Gold · Mohs 6.25

Obsidian

Black · Mohs 5.25

Amber

Yellow · Mohs 2.25

Coral

Red · Mohs 3.5

Tiger's Eye

Brown · Mohs 6.75

Aventurine

Green · Mohs 6.75

Prehnite

Green · Mohs 6.25

Larimar

Blue · Mohs 5

Kyanite

Blue · Mohs 6

Andalusite

Brown · Mohs 7.25

Sphene

Green · Mohs 5.25

Chrome Diopside

Green · Mohs 5.75

Paraiba Tourmaline

Blue · Mohs 7.25

Tourmaline

Green · Mohs 7.25

Padparadscha Sapphire

Orange · Mohs 9

White Sapphire

Colorless · Mohs 9

Black Diamond

Black · Mohs 10

Bloodstone

Green · Mohs 6.75

Chalcedony

Blue · Mohs 6.75

Amazonite

Green · Mohs 6.25

Chrysoberyl

Yellow · Mohs 8.5

Heliodor

Yellow · Mohs 7.75

Rubellite

Pink · Mohs 7.25

Indicolite

Blue · Mohs 7.25

Green Amethyst

Green · Mohs 7

Goshenite

Colorless · Mohs 7.75

Rhodolite Garnet

Purple · Mohs 7.25

Imperial Topaz

Orange · Mohs 8

Cubic Zirconia

Colorless · Mohs 8.25

Hiddenite

Green · Mohs 6.75

Blue Topaz

Blue · Mohs 8