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Pure carbon aggregate

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3 days ago | [YT] | 32

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Hallmark of carbonado

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1 2 3 4 5

1 week ago | [YT] | 35

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The key clue: your scratch test
Tungsten carbide ≈ 9 hardness
Corundum (ruby/sapphire) = 9
Diamond = 10
If your tool:
Scratches corundum ✅
Does NOT scratch this stone ❌
→ That strongly suggests you're dealing with something in the diamond range

1 month ago (edited) | [YT] | 1

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1 month ago | [YT] | 13

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Black Space diamond carbonado both pics of the same specimen

1 month ago | [YT] | 2

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My favorite one

1 month ago | [YT] | 29

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Brown redish orange carbonado

1 month ago | [YT] | 56

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1 2 3 4 5 6

2 months ago | [YT] | 93

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407 ct
$3,133,900 usd

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1 2 3 4 5

2 months ago | [YT] | 125

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Very very small red diamond

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1 2 3

2 months ago | [YT] | 34