Some treated gemstones remain at high value by their boast of excellent quality and splendour; however, untreated gemstones are by far the most sought-after. This makes natural or treated gems have different value dimensions defined by their rarity, beauty and popularity. Although gemstones are treated with different methods in order to improve their appearance in colour and or clarity, treatments in gemstones are generally acceptable if they are stable, durable and disclosed.

G-ID has determined an enhancement terminology for all detectable treatments found in gems at the time of examination. These wordings/nomenclatures are in accordance with the international guidelines laid down by the CIBJO and Laboratory Manual Harmonization Committee (LMHC). The disclosure policy is revised from time to time with the introduction of a new form of treatment or modification of an existing method.

We use the following enhancement terminology for disclosing treatment(s) on G-ID reports based on types of gems.