Diamond Inclusion
DIAMOND CLARITY
| Internal Fracture (inclusion) | A - B | |
| 1. A separation or break due to either cleavage or fracture, often white and feathery in appearance. | Feather (Ftr) |
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| 2. A hazy or milky area made up of a number of very small inclusions. | Cloud (Cld) |
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| 3. A mineral crystal contained in a diamond. | Included Crystal (Xtl) |
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| 4. A dark or color natural mineral crystal that penetrates in a diamond. | Indented Natural (IndN) |
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| 5. A tiny tube made by a laser; the surface opening may resemble a pit, while the tube usually resembles a needle. | Laser Drill Hole (LDH) |
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| 6. A very small inclusion; under 10X, normally seen as a tiny singly dot. | Pinpoint ((Pp)) |
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| 7. A very small inclusion; under 10X, normally seen as a tiny group of dot. | Pinpoint Group ((Pg)) |
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| 8. Internal indications of irregular crystal growth; may appear milky, like faint lines or streaks, or may be colored or reflective. | Internal Graining ((IntGr)) |
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| 9. A long, thin, included crystal which looks like a tiny rod. | Needle ((Ndl)) |
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| 10. A cloudy area produced by crystal structure distortion, usually associated with twinning planes. | Twinning planes ((Tp)) |
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| 11. Tiny feathers extending in from a bruted girdle. | Grace Form Berding ((GB)) |
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| External Fracture (Blemishes) | A - B | |
| 1. Surface crumbling, often accompanied by tiny, root-like feathers. | Bruise (Br) |
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| 2. A large or deep opening. | Cavity (Cv) |
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| 3. A linear indentation normally seen as a fine white line, curved or straight. | Scratch (S) |
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| 4. Tiny nicks along facet junctions, producing white fuzzy lines instead of sharp facet edges. | Abrasion (Abr) |
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| 5. A notch near the culet or a facet edge | Culette (C) |
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| 6. Tiny feathers like, extending on the surface around the girdle. | Bearding (BG) |
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| 7. A notch, often a small or shallow opening usually on the girdle edge. | Chip (Ch) |
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| 8. Tiny parallel lines left by polishing; fine parallel ridges confined to as ingle facet, cause by crystal structure irregularities; or tiny, parallel, polished grooves produced by irregularities in the scaife surface. | Polish Lines (PL) |
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| 9. Surface clouding caused by excessive heat (also called burn mark or burned facet), or uneven polished surface resulting from structural irregularities. | Polish Mark (PM) | - |
| 10. A facet placed without regard for symmetry and not required by the cutting style. | Extra Facets (EF) |
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| 11. Part of the original crystal surface remaining on the polished stone. | Natural (N) |
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| 12. Surface indication or structural irregularity; may resemble fain facet junction lines, or cause a grooved or wavy surface; often crosses facet junctions. | Surface Graining (SGr) |
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CLARITY: (The degree to which a stone is free from external marks called blemishes and internal features called inclusions). There are eleven GIA clarity grades, which are defined in the chart below: