Indented Naturals: natural rough surfaces that penetrate the stone and may distort the girdle outline.
Internal Graining: regions of irregular crystal growth that may appear as milky or colored lines or streaks, or may be reflective.
Laser Drill Holes: a tiny tube made by a laser; the surface opening may resemble a pit, while the tube usually resembles a needle.
Needles: needle-shaped included crystals.
Pinpoints: areas of minute, dot-like inclusions.
Twinning Wisps: cloudy areas produced by distorted crystal growth.
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Clarity All clarity grading is performed at 10-times magnification using a hand loupe or gemological microscope under both artificial daylight and darkfield illumination conditions. Reflected light is used to detect and evaluate blemishes and darkfield light for inclusions. It's the face-up view that usually sets the clarity grade, however the face-up, pavilion and table-to-culet views are all taken into consideration during grading.
Clarity grades are largely determined by the collective visual appearance that a stone's inclusions exhibit in relationship to the size and shape of the stone. It is the consideration of the size, position, number, color/contrast and nature of these inclusions, which leads to the final clarity grade.
