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

Bornite

SULFIDE MOHS 3

Botswana Agate

CHALCEDONY (QUARTZ) MOHS 6.5–7

Bronzite

PYROXENE MOHS 5.5

Brookite

OXIDE MOHS 5.5–6

Brookite Quartz

OXIDE / QUARTZ MOHS 6–7

Bustamite

PYROXENOID MOHS 5.5–6.5

MOHS

Calcite

CARBONATE MOHS 3

Cancrinite

FELDSPATHOID MOHS 5–6

Caribbean Calcite

CARBONATE MOHS 3

Carnelian

CHALCEDONY (QUARTZ) MOHS 6.5–7

Cassiterite

OXIDE MOHS 6–7

Cavansite

PHYLLOSILICATE MOHS 3–4

Celestite

SULFATE MOHS 3–3.5

Cerussite

CARBONATE MOHS 3–3.5

Chalcanthite

SULFATE MOHS 2.5

Chalcedony

QUARTZ MOHS 6.5–7

Chalcocite

SULFIDE MOHS 2.5–3

Charoite

SILICATE MOHS 5–6

Cherry Quartz

QUARTZ (SYNTHETIC) MOHS 7

Chiastolite

NESOSILICATE MOHS 6.5–7

Chlorite Phantom Quartz

QUARTZ MOHS 7

Chromite

OXIDE MOHS 5–5.5

Chrysanthemum Stone

CARBONATE MOHS 3–3.5

Chrysocolla

SILICATE MOHS 2–4

Chrysoprase

QUARTZ MOHS 6.5–7

Cinnabar

SULFIDE MOHS 2–2.5

Citrine

QUARTZ MOHS 7

Clear Quartz

QUARTZ MOHS 7

Clinozoisite

SOROSILICATE MOHS 6–6.5

Cobaltoan Calcite

CARBONATE MOHS 3

Color Change Fluorite

HALIDE MOHS 4

Copper

NATIVE ELEMENT MOHS 2.5–3

Fossil Coral

CARBONATE MOHS 3–4

MOHS

Crazy Lace Agate

CHALCEDONY MOHS 6.5–7

Cuprite

OXIDE MOHS 3.5–4

Danburite

SILICATE MOHS 7–7.5

Datolite

SILICATE MOHS 5–5.5

Desert Glass

TEKTITE MOHS 5.5–6

Desert Rose

SULFATE MOHS 2

MOHS

Diopside

PYROXENE MOHS 5.5–6.5

Dioptase

CYCLOSILICATE MOHS 5

Dolomite

CARBONATE MOHS 3.5–4

Druzy Quartz

QUARTZ MOHS 7

Dumortierite

BOROSILICATE MOHS 7–8

Ekanite

SILICATE MOHS 6–7
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