1 pcs Blue Tanzanite - 15.89 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

1 pcs Blue Tanzanite - 15.89 ct - Antwerp Laboratory for Gemstone Testing (ALGT) #1.0
1 pcs Blue Tanzanite - 15.89 ct - Antwerp Laboratory for Gemstone Testing (ALGT) #1.0
1 pcs Blue Tanzanite - 15.89 ct - Antwerp Laboratory for Gemstone Testing (ALGT) #2.1
1 pcs Blue Tanzanite - 15.89 ct - Antwerp Laboratory for Gemstone Testing (ALGT) #3.2
1 pcs Blue Tanzanite - 15.89 ct - Antwerp Laboratory for Gemstone Testing (ALGT) #4.3
01
day
16
hours
04
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Starting bid
€ 1
Reserve price not met
Ghene Menezes
Expert
Selected by Ghene Menezes
Retail Estimate  € 2,400 - € 2,900
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Single blue Tanzanite gemstone, 15.89 ct, cushion shape with a mixed cut, origin Tanzania, transparent, natural zoisite, ALGT laboratory report no. 55000543, treatment not specified, moderate clarity enhancement in fissures.

AI-assisted summary

Description from the seller

ALGT Colored Stone Identification Report n. 55000543 (28 July, 2026)
Natural Zoisite
Tanzanite
Cshion Shape, Mixed Cut
Ct. 15.89
14.31 x 12.27 x 9.68
Deep Purplish BLue
Transparent
Origin from Tanzania
Moderate amount of clarity enhancement in fissures

AIG Gemstone Report n. GEM20260417165429 (17 Apr 2026)

Seller's Story

Private collector. Offers selected colored gems.

ALGT Colored Stone Identification Report n. 55000543 (28 July, 2026)
Natural Zoisite
Tanzanite
Cshion Shape, Mixed Cut
Ct. 15.89
14.31 x 12.27 x 9.68
Deep Purplish BLue
Transparent
Origin from Tanzania
Moderate amount of clarity enhancement in fissures

AIG Gemstone Report n. GEM20260417165429 (17 Apr 2026)

Seller's Story

Private collector. Offers selected colored gems.

Details

Number of stones
1
Lab report number
55000543
Gemstone type
Tanzanite
Total carat weight
15.89
Gemstone colour
Blue
Transparency
Transparent
Treatment
Not specified in the report
Origin as given on certificate
Tanzania
Laboratory report
Antwerp Laboratory for Gemstone Testing (ALGT)
Sealed by laboratory
No
Shape
Cushion
Cutting style
Mixed cut
Sold by
VinceRiver
ItalyVerified
1837
Objects sold
100%
556
Reviews
Privatetop

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