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Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2557966125

Certificate GIA 2557966125

Diamond specifications and retailer prices

From $1,244 NZD
₹66,642 INR
As of November 2, 2026
Save $3,939 NZD (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,183 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557966125. Listed at 13 retailers as of October 30, 2026, with prices from $1,244 to $5,183, a $3,939 spread on the same certified stone. NZ Jewellers lists it at $5,183. 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

0.66
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557966125
Dimensions5.58 × 5.55 × 3.49 mm
L/W Ratio1.01
Girdle conditionSlightly Thick
Top View
5.58 mm5.55 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557966125
Side View
Table 56.0%Crown 35.5°Girdle: ThinPavilion 41.2°Culet: NoneDepth 62.7%

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 2
Current: $5,183 NZD|Low: $1,104 NZD|High: $5,183 NZD|Avg: $2,118 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
November 3, 2026
Retailer 6$1,244 NZD
Retailer 4$1,294 NZD
Retailer 13$1,669 NZD
Retailer 10$1,671 NZD
Retailer 3$1,816 NZD
Retailer 12$1,889 NZD
Retailer 2$1,923 NZD
Retailer 7$2,138 NZD
Retailer 8$2,152 NZD
Retailer 5$2,354 NZD
Retailer 11$2,468 NZD
Retailer 9$3,027 NZD
NZ Jewellers$5,183 NZD

23 data points across 13 retailers

13 retailers$1,244 NZD to $5,183 NZD

A
Cheapest Retailer
-
$1,244 NZD
₹66,642 INR
A
Retailer 2
-
$1,294 NZD
$728 USD
View
Final sale: no returns
B+
Retailer 3
-
$1,669 NZD
$939 USD
View
B+
Retailer 4
-
$1,671 NZD
$940 USD
View
B+
Retailer 5
-
$1,816 NZD
$1,022 USD
View
B+
Retailer 6
-
$1,889 NZD
$1,063 USD
View
B+
Retailer 7
-
$1,923 NZD
£852 GBP
View
B+
Retailer 8
-
$2,138 NZD
£947 GBP
View
B+
Retailer 9
-
$2,152 NZD
€1,153 EUR
View
Retailer 10
-
$2,354 NZD
A$2,038 AUD
View
Price last confirmed 30 days ago
B
Retailer 11
-
$2,468 NZD
ZAR 22,433 ZAR
View
B
Retailer 12
-
$3,027 NZD
£1,341 GBP
View
Most Expensive
B
NZ Jewellers
32482787-982f-4cf7-b41c-92ed8cc2a066 · Oct 30
$5,183 NZD
$2,916 USD
View
12 more retailers have this diamond
Prices start from $1,244 NZDSave up to $3,939 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
0.66ct Round
$1,244 NZD