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Round|Natural|GIA

1.51ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 6511363422

Certificate GIA 6511363422

Diamond specifications and retailer prices

From $10,007 NZD
$5,640 USD
As of November 1, 2026
Save $12,081 NZD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $22,088 NZD at NZ Jewellers · As of October 30, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6511363422. Listed at 16 retailers as of October 30, 2026, with prices from $10,007 to $22,088, a $12,081 spread on the same certified stone. NZ Jewellers lists it at $22,088. 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
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6511363422
Dimensions7.31 × 7.27 × 4.54 mm
L/W Ratio1.01
Top View
7.31 mm7.27 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6511363422
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $22,088 NZD|Low: $9,576 NZD|High: $22,088 NZD|Avg: $13,706 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
November 1, 2026
Retailer 7$10,007 NZD
Retailer 8$10,435 NZD
Retailer 9$11,041 NZD
Retailer 3$11,043 NZD
Retailer 11$11,964 NZD
Retailer 10$12,149 NZD
Retailer 6$12,368 NZD
Retailer 2$13,589 NZD
Retailer 12$13,804 NZD
Retailer 4$14,551 NZD
Retailer 5$18,405 NZD
NZ Jewellers$22,088 NZD

36 data points across 12 retailers

16 retailers$10,007 NZD to $22,088 NZD

A
Cheapest Retailer
-
$10,007 NZD
$5,640 USD
A
Retailer 2
-
$10,142 NZD
$5,716 USD
View
A
Retailer 3
-
$10,435 NZD
$5,881 USD
View
B+
Retailer 4
-
$11,041 NZD
$6,223 USD
View
Final sale: no returns
A
Retailer 5
-
$11,043 NZD
$6,224 USD
View
B+
Retailer 6
-
$11,964 NZD
$6,743 USD
View
B+
Retailer 7
-
$12,149 NZD
$6,847 USD
View
B+
Retailer 8
-
$12,368 NZD
£5,489 GBP
View
B+
Retailer 9
-
$13,059 NZD
$7,360 USD
View
B+
Retailer 10
-
$13,059 NZD
$7,360 USD
View
B+
Retailer 11
-
$13,096 NZD
$7,381 USD
View
B+
Retailer 12
-
$13,502 NZD
$7,610 USD
View
B+
Retailer 13
-
$13,589 NZD
€7,294 EUR
View
B+
Retailer 14
-
$13,804 NZD
$7,780 USD
View
B
Retailer 15
-
$18,405 NZD
£8,168 GBP
View
Most Expensive
B
NZ Jewellers
674544cd-a763-4487-a622-a750ca9529cc · Oct 30
$22,088 NZD
$12,449 USD
View
15 more retailers have this diamond
Prices start from $10,007 NZDSave up to $12,081 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.

A
1.51ct Round
$10,007 NZD