Slightly Imperfect - A grade of relative imperfection in a diamond. It signifies a more flawed condition than very slightly imperfect but less than imperfect.
slightly imperfect (SI)
imperfect 1-3 (I 1-3)
The designation "flawless" describes according to the American diamond nomenclature cut diamonds, free from internal and external faults, as also external features were considered .
Top grades begin at internally flawless to VVS1-VVS2 (very-very slightly imperfect), VS1-VS2 (very slightly imperfect), and SI1-SI2 (slightly imperfect) I1-I2-I3 imperfect.
We rejected a number of other blue diamonds for various reasons, some had a sea-green overtone, others were not as bright, probably due to having slightly imperfect proportions, ...
Damaged 'industrial' items are virtually worthless, whether or not they have been repaired or restored, but a slightly imperfect, but still decorative piece is well worth buying, providing the price reflects its condition.
SI1 The first level or better of the two "slightly imperfect" levels in GIA's clarity grading scale. Two grades within the eye- clean range.
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Czech beads are slightly imperfect and this flaw gives jewellery a look that bespeaks character. Seed beads are great for delicate beaded jewellery and are widely available both at stores and on the web.
 See also: Imperfect, Perfect, Cut, Facet, Color
  
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