CT: Carat (Gemstone Weight: 5.0 carats = 1.0grams)

CTW: Total Carat Weight

CZ: Cubic Zirconia

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E: Routinely Enhanced

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F: Flawless

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GR: Grams

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I: Included

IF: Internally Flawless

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N: Natural

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R: Neutron Irradiation

RBC: Round Brilliant Cut (Frequently referring to a diamond cut)

RD: Round Shape/Cut (Single cut diamond, fewer facets than RBC)

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SC: Single Cut (Diamonds with fewer facets than RBC)

SI: Slightly Included

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TCW: Total Carat Weight

TW: Total Weight

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VSI: Very Slightly Included

VVSI: Very Very Slightly Included

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