Hardness focus

very hard Gemstones

Compare durability and finishing options for gemstones in this hardness range.

All hardness levels

Black Spinel

Black Spinel is a Black oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Black
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Blue Spinel

Blue Spinel is a Blue oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue
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Diamond

Diamond is a Colourless, White native element prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

10 Mohs Colourless / Clear, White
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Green Sapphire

Green Sapphire is a Green oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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Orange Sapphire

Orange Sapphire is a Orange oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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Orange Spinel

Orange Spinel is a Orange oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Orange
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Padparadscha Sapphire

Padparadscha Sapphire is a Blue, Pink oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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Paraiba Spinel

Paraiba Spinel is a Blue, Pink oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Aqua, Blue
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Pink Sapphire

Pink Sapphire is a Pink oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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Pink Spinel

Pink Spinel is a Pink oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Pink
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Red Spinel

Red Spinel is a Red oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Red
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Royal Blue Sapphire

Royal Blue Sapphire is a Blue oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Royal Blue
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Ruby

Ruby is a Red, Crimson oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Burgundy, Red
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Sapphire

Sapphire is a Blue, Pink oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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Spinel

Spinel is a Blue, Pink oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Pink
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Star Ruby

Star Ruby is a Red, Crimson oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Burgundy, Red
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Star Sapphire

Star Sapphire is a Blue, Pink oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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White Sapphire

White Sapphire is a White oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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White Spinel

White Spinel is a White oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs White
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Yellow Sapphire

Yellow Sapphire is a Yellow oxide (corundum) prized for its distinctive beauty, historic appeal, and use in fine jewellery and collector pieces.

9 Mohs Blue, Sapphire Blue
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