Octagon Calibrated Gems for Standard Jewelry Mountings (Settings) from GemSelect.com

• Sapphire

• Emerald

• Ruby

• Aquamarine

• Zircon

• Opal

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• Actinolite Cat's Eye

• Agate

• Agate Geode

• Almandine Garnet

• Amazonite

• Amethyst

• Amethyst Geode

• Ametrine

• Ammolite

• Andalusite

• Andesine Labradorite

• Apatite

• Aquamarine

• Aventurine

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• Beryl

• Black Opal

• Bloodstone

• Boulder Opal

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• Calcite

• Carnelian

• Cat's Eye Apatite

• Cat's Eye Aquamarine

• Cat's Eye Gemstones

• Cat's Eye Moonstone

• Cat's Eye Opal

• Cat's Eye Scapolite

• Chalcedony

• Charoite

• Chocolate Opal

• Chrome Diopside

• Chrome Tourmaline

• Chrysoberyl

• Chrysoberyl Cat's Eye

• Chrysocolla

• Citrine

• Citrine Geode

• Clinohumite

• Color-Change Diaspore

• Color-Change Fluorite

• Color-Change Garnet

• Color-Change Sapphire

• Coral

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• Demantoid Garnet

• Dendritic Agate

• Diamond

• Druzy Azurite

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• Emerald

• Enstatite

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• Fire Agate

• Fire Opal

• Fluorite

• Fossil Coral

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• Garnet

• Golden Beryl

• Grandidierite

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• Hawk's Eye

• Hematite

• Hessonite Garnet

• Hiddenite

• Howlite

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• Imperial Topaz

• Iolite

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• Jade Gemstones

• Jadeite

• Jasper

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• Kornerupine

• Kunzite

• Kyanite

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• Labradorite

• Lapis Lazuli

• Larimar

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• Malachite

• Malaya Garnet

• Mali Garnet

• Maw-Sit-Sit

• Moonstone

• Morganite

• Moss Opal

• Mother of Pearl

• Mystic Quartz

• Mystic Topaz

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• Obsidian

• Opal

• Opal Doublet

• Opal in Matrix

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• Pearl

• Peridot

• Pietersite

• Prehnite

• Pyrite

• Pyrope Garnet

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• Quartz

• Quartz Cat's Eye

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• Rainbow Moonstone

• Rainbow Pyrite

• Rhodochrosite

• Rhodolite Garnet

• Rose Quartz

• Ruby

• Ruby in Fuchsite

• Ruby-Zoisite

• Rutile Quartz

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• Sapphire

• Scapolite

• Scolecite

• Seraphinite

• Serpentine

• Sillimanite

• Sillimanite Cat's Eye

• Smithsonite

• Smoky Quartz

• Snowflake Obsidian

• Sodalite

• Spectrolite

• Spessartite Garnet

• Sphalerite

• Sphene

• Spinel

• Star Diopside

• Star Garnet

• Star Gemstones

• Star Lemon Quartz

• Star Moonstone

• Star Rose Quartz

• Star Ruby

• Star Sapphire

• Star Sunstone

• Strawberry Quartz

• Sugilite

• Sunstone

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• Tanzanite

• Tiger's Eye

• Tiger's Eye Matrix

• Topaz

• Tourmaline

• Tsavorite Garnet

• Turquoise

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• Variscite

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• Zircon

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