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

Ocean Jasper

CHALCEDONY MOHS 6.5–7

Oligoclase

FELDSPAR MOHS 6–6.5

Onyx

CHALCEDONY MOHS 6.5–7

Green Onyx

CHALCEDONY MOHS 6.5–7

Opal

HYDRATED SILICA MOHS 5.5–6.5

Boulder Opal

HYDRATED SILICA MOHS 5.5–6.5

Fire Opal

HYDRATED SILICA MOHS 5.5–6.5

Peruvian Pink Opal

HYDRATED SILICA MOHS 5.5–6.5

White Opal

HYDRATED SILICA MOHS 5.5–6.5

Orange Calcite

CALCITE MOHS 3

Orca Agate

CHALCEDONY MOHS 6.5–7

Orpiment

SULFIDE MOHS 1.5–2

Pargasite

AMPHIBOLE MOHS 5–6

Pearl

ORGANIC GEMSTONE MOHS 2.5–4.5

Pectolite

INOSILICATE MOHS 4.5–5

Peridot

OLIVINE MOHS 6.5–7

Petalite

FELDSPATHOID MOHS 6–6.5

Petrified Wood

QUARTZ MOHS 6.5–7

Phenacite

NESOSILICATE MOHS 7.5–8

Phlogopite

MICA MOHS 2.5–3

Phosphosiderite

PHOSPHATE MOHS 3.5–4

Pietersite

QUARTZ MOHS 6.5–7

Pink Amethyst

QUARTZ MOHS 7

Pink Halite

HALIDE MOHS 2–2.5

Pink Opal

OPAL MOHS 5.5–6.5

Prehnite

SILICATE MOHS 6–6.5

Prehnite with Epidote

SILICATE MOHS 6–6.5

Proustite

SULFOSALT MOHS 2–2.5

Psilomelane

OXIDE MOHS 5–6

MOHS

Purpurite

PHOSPHATE MOHS 4–4.5

Pyrite

SULFIDE MOHS 6–6.5

Pyromorphite

PHOSPHATE MOHS 3.5–4

MOHS

Harlequin Quartz

SILICATE MOHS 7

Rainbow Obsidian

VOLCANIC GLASS MOHS 5–5.5

Rhodochrosite

CARBONATE MOHS 3.5–4

Rhodolite Garnet

GARNET MOHS 7–7.5

Rhodonite

SILICATE MOHS 5.5–6.5

Rhyolite

VOLCANIC ROCK MOHS 6–7

Rose Quartz

SILICATE MOHS 7

Roselite

ARSENATE MOHS 3.5

Ruby

CORUNDUM MOHS 9

Ruby Fuchsite

CORUNDUM AND MICA MOHS 2–9

Ruby in Fuchsite

CORUNDUM AND MICA MOHS 2–9

Ruby in Zoisite

CORUNDUM AND SOROSILICATE MOHS 6–7

Rutilated Quartz

QUARTZ MOHS 7

Rutile

OXIDE MOHS 6–6.5
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