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A DEFINITIVE GEOLOGICAL RECORD. CATALOGING SPECIMENS ACROSS THE WORLD'S MOST SOUGHT-AFTER FAMILIES.

Indigo Gabbro

IGNEOUS ROCK MOHS 6

Mystic Merlinite

IGNEOUS ROCK MOHS 6

Iolite

CORDIERITE MOHS 7

Iolite (Water Sapphire)

CORDIERITE MOHS 7

Jade

PYROXENE OR AMPHIBOLE MOHS 6–7

Jade (Actinolite)

AMPHIBOLE MOHS 6–6.5

Jade (Nephrite)

AMPHIBOLE MOHS 6–6.5

Jasper

QUARTZ MOHS 6.5–7

Jasper (Fancy)

QUARTZ MOHS 6.5–7

Jet

ORGANIC MINERALOID MOHS 2.5–4

Kambaba Jasper

QUARTZ MOHS 6.5–7

Kammererite

CHLORITE MOHS 2–2.5

Kornerupine

BOROSILICATE MOHS 6–7

Kunzite

SPODUMENE MOHS 6.5–7

Kyanite

ALUMINUM SILICATE MOHS 4.5–7

Kyanite (Black)

ALUMINUM SILICATE MOHS 4.5–7

Labradorite

FELDSPAR MOHS 6–6.5

Labradorite (Spectrolite)

FELDSPAR MOHS 6–6.5

Lapis Lazuli

FELDSPATHOID MOHS 5–5.5

Larimar

PECTOLITE MOHS 4.5–5

Lazulite

PHOSPHATE MOHS 5.5–6

Lemon Quartz

QUARTZ MOHS 7

Lemurian Quartz

QUARTZ MOHS 7

Lepidocrocite

IRON OXIDE HYDROXIDE MOHS 5

Lepidolite

MICA MOHS 2.5–3

Libyan Desert Glass

TEKTITE / NATURAL GLASS MOHS 5.5–6

Limonite

IRON OXIDES MOHS 4–5.5

Llanite

IGNEOUS ROCK (QUARTZ + FELDSPAR) MOHS 6–7

Lodestone

SPINEL GROUP MOHS 5.5–6.5

Mahogany Obsidian

VOLCANIC GLASS MOHS 5–5.5

Malachite

CARBONATES MOHS 3.5–4

Malachite (Fibrous)

CARBONATE MOHS 3.5–4

Marcasite

SULFIDES MOHS 6–6.5

Maw-Sit-Sit

JADEITE-RELATED ROCKS MOHS 6–7

Merlinite

QUARTZ (OPALIZED) MOHS 6–7

Mica

PHYLLOSILICATES MOHS 2–4

Microcline

FELDSPAR MOHS 6–6.5

Moldavite

TEKTITE MOHS 5.5–7

Moonstone

FELDSPAR MOHS 6–6.5

Black Moonstone

FELDSPAR MOHS 6–6.5

Morganite

BERYL MOHS 7.5–8

Moss Agate

CHALCEDONY MOHS 6.5–7

MOHS

Neptunite

SILICATES MOHS 5–6

Nuummite

AMPHIBOLE MOHS 5.5–6

Obsidian

VOLCANIC GLASS MOHS 5–5.5

Gold Sheen Obsidian

VOLCANIC GLASS MOHS 5–5.5

Rainbow Obsidian

VOLCANIC GLASS MOHS 5–5.5