Natural Tanzanite Gemstone · 0.031 ct · Round Brilliant Cut · Tanzania

 13,21

Natural Tanzanite  Gemstone· 0.031 ct · Round Brilliant Cut

Natural light violet-blue Tanzanite with a calibrated 2.0 mm round brilliant cut and individual NGB quality evaluation.

NGB Score: 95/100 · Excellent
NGB Verification: NGB-000010
Gently Heated · Exact Gemstone Shown · Only 1 Available

1 in stock

NGB Reference: NGB-000010 SKU: FA-TANZ026BP-003-571 Category: Brand:
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A natural Tanzanite Gemstone weighing 0.031 ct, fashioned as a precise round brilliant cut. The gemstone displays an attractive light violet-blue appearance with characteristic pleochroism and lively light return for its calibrated size.

Its balanced proportions and polished faceting make it suitable for delicate fine-jewellery applications, accent-stone settings and precision designs.

Tanzanite is the blue-to-violet variety of zoisite. This gemstone has been gently heated, a commonly accepted treatment used to develop Tanzanite’s characteristic blue-violet colour.

This is a unique natural gemstone. You will receive the exact gemstone shown in the product photographs.

Overall Score: 95.0/100

NGB Grade: Excellent

Quality Evaluation

Color19.0/20
Clarity19.0/20
Cut19.0/20
Optical Performance19.0/20
Overall Appeal19.0/20

Evaluation Notes

This natural Tanzanite displays a beautiful light violet-blue colour with characteristic pleochroism. The round brilliant cut is well executed with excellent symmetry and lively brilliance for its calibrated size. No visible chips or surface damage were observed in the available evaluation material.

Species

Zoisite

Gemstone Variety

Tanzanite

Color

Blue

Shape

Round

Cut

Brilliant Cut

Treatment

Heated

Origin

Tanzania

Transparency

Transparent

Gemological Properties

Carat Weight0.031 ct
Dimensions2.0 × 2.0 mm
TransparencyTransparent
ClarityVS1
Refractive Index1.691–1.700
Specific Gravity3.35
Hardness6–7 Mohs Mohs
Birefringence0.009
Crystal SystemOrthorhombic
Dispersion0.021
LusterVitreous
Color DescriptionLight violet-blue
Transparency NotesTransparent with good light transmission.
Natural CharacteristicsMinor natural internal characteristics consistent with natural Tanzanite.

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