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: