Loose Diamond Definitions: S

Scintillation-The display of reflections from the polished facets of a gemstone seen by the observer when either the illuminant, the gemstone or the observer is in motion—a flashing or twinkling of light from the facets.

Scratch-A linear indentation normally seen as a fine white line, curved or straight.

Single Cut-A simple form of cutting that has a circular girdle, a table, eight bezel facets, eight pavilion facets and sometimes a culet. It is used mostly for small diamond melee.

Slightly Imperfect-A grade of relative imperfection in a diamond.

Slightly Yellow-A diamond color grade that is used by some dealers for a stone showing an obvious yellow tint to the unaided eye.

Solitaire-A term used to refer to a ring containing a single diamond or other gem.

Spread diamond-A Diamond with a large table and a thin crown height.

Spread Stone-A term that is used frequently in the diamond trade to refer to a stone that has been cut with a large table and a thin crown, to retain greater weight from the two sawn pieces of an octahedron than is possible by using ideal proportions.

Square Emerald Cut-A form of step cutting with a square girdle outline but modified by corner facets.

Star Facets-The eight triangular facets that surround the table facet of a round, brilliant-cut diamond.

Surface Graining - Surface indication of structural irregularity. May resemble faint facet junction lines, or cause a grooved or wavy surface, often cross facet junctions.

Symmetry-A term referring to the quality of the fashioning of a gemstone. The balance of the outline shape and the precision of the facet arrangement are considered in the symmetry grade.

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