GIA DIAMOND ESSENTIALS FINAL EXAM 2026
PREMIUM REVIEW QUESTIONS CORRECT
RESPONSES
◉ bruise (br). Answer: tiny area of impact with very small, root-like
feathers, typically occur at a facet junction
◉ cloud (cld). Answer: many tightly grouped pinpoints too small to
distinguish individually but together have a hazy appearance
◉ crystal (xh). Answer: a mineral crystal in a diamond
◉ etch channel (ec). Answer: angular opening that starts at surface
and extends into diamond
◉ indented natural (in). Answer: portion of roughs original surface
◉ internal graining (ig). Answer: lines, angles, curves that are
whitish colored or reflective
◉ internal laser drilling (ild). Answer: laser drilling within diamond
that does not reach surface
, ◉ knot (k). Answer: an included diamond crystal that extends to
surface after cutting
◉ laser drill hole (ldh). Answer: tiny surface-reaching tunnel made
by a laser beam
◉ needle (ndl). Answer: thin, elongated crystal that looks like a tiny
rod @ 10x
◉ patch of color (patch). Answer: naturally occurring radiation stain
left on a polished diamond
◉ pinpoint (pp). Answer: small crystal- tiny dot at 10x
◉ twinning wisp (tw). Answer: series of pinpoints/clouds/crystals
that form in diamonds growth place- associated with crystal
distortion and twinning planes
◉ abrasion (abr). Answer: series of minute scratches and pits along
a diamonds facet junctions, producing a white/fuzzy look
PREMIUM REVIEW QUESTIONS CORRECT
RESPONSES
◉ bruise (br). Answer: tiny area of impact with very small, root-like
feathers, typically occur at a facet junction
◉ cloud (cld). Answer: many tightly grouped pinpoints too small to
distinguish individually but together have a hazy appearance
◉ crystal (xh). Answer: a mineral crystal in a diamond
◉ etch channel (ec). Answer: angular opening that starts at surface
and extends into diamond
◉ indented natural (in). Answer: portion of roughs original surface
◉ internal graining (ig). Answer: lines, angles, curves that are
whitish colored or reflective
◉ internal laser drilling (ild). Answer: laser drilling within diamond
that does not reach surface
, ◉ knot (k). Answer: an included diamond crystal that extends to
surface after cutting
◉ laser drill hole (ldh). Answer: tiny surface-reaching tunnel made
by a laser beam
◉ needle (ndl). Answer: thin, elongated crystal that looks like a tiny
rod @ 10x
◉ patch of color (patch). Answer: naturally occurring radiation stain
left on a polished diamond
◉ pinpoint (pp). Answer: small crystal- tiny dot at 10x
◉ twinning wisp (tw). Answer: series of pinpoints/clouds/crystals
that form in diamonds growth place- associated with crystal
distortion and twinning planes
◉ abrasion (abr). Answer: series of minute scratches and pits along
a diamonds facet junctions, producing a white/fuzzy look
