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Round|Natural|GIA

1.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 6551195115

Certificate GIA 6551195115

Diamond specifications and retailer prices

From $10,185 NZD
As of November 4, 2026
Save $11,377 NZD (53%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $21,562 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551195115. Listed at 17 retailers as of November 4, 2026, with prices from $10,185 to $21,562, a $11,377 spread on the same certified stone. NZ Jewellers lists it at $21,562. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551195115
Dimensions7.27 × 7.32 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.27 mm7.32 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551195115
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $21,562 NZD|Low: $9,882 NZD|High: $21,562 NZD|Avg: $13,897 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 13$10,185 NZD
Retailer 12$10,780 NZD
Retailer 3$11,678 NZD
Retailer 14$11,678 NZD
Retailer 15$11,678 NZD
Retailer 2$12,160 NZD
Retailer 4$12,988 NZD
Retailer 5$12,988 NZD
Retailer 9$13,250 NZD
Retailer 6$13,421 NZD
Retailer 16$13,475 NZD
Retailer 7$14,209 NZD
Retailer 8$15,369 NZD
Retailer 11$18,690 NZD
Retailer 10$18,941 NZD
NZ Jewellers$21,562 NZD

40 data points across 16 retailers

17 retailers$10,185 NZD to $21,562 NZD

B+
Cheapest Retailer
-
$10,185 NZD
B+
Retailer 2
-
$10,580 NZD
View
B+
Retailer 3
-
$10,780 NZD
View
Final sale: no returns
B+
Retailer 4
-
$11,678 NZD
View
Retailer 5
-
$11,678 NZD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$11,678 NZD
View
B+
Retailer 7
-
$11,895 NZD
View
B+
Retailer 8
-
$12,160 NZD
View
B
Retailer 9
-
$12,988 NZD
View
B
Retailer 10
-
$12,988 NZD
View
B+
Retailer 11
-
$13,250 NZD
View
B
Retailer 12
-
$13,421 NZD
View
B
Retailer 13
-
$13,475 NZD
View
Retailer 14
-
$14,209 NZD
View
Price last confirmed 14 days ago
B
Retailer 15
-
$18,690 NZD
View
B
Retailer 16
-
$18,941 NZD
View
Most Expensive
B
NZ Jewellers
112a2b8c-ffcb-4595-b717-688310880cd5 · Nov 5
$21,562 NZD
$11,953 USD
View
16 more retailers have this diamond
Prices start from $10,185 NZDSave up to $11,377 NZD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.51ct Round
$10,185 NZD