Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2557966125

Certificate GIA 2557966125

Diamond specifications and retailer prices

From $700 USD
₹66,642 INR
As of November 2, 2026
Save $2,216 USD (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,916 USD 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 $700 to $2,916, a $2,216 spread on the same certified stone. NZ Jewellers lists it at $2,916. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $2,916 USD|Low: $621 USD|High: $2,916 USD|Avg: $1,189 USD
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 2, 2026
Retailer 2$700 USD
Retailer 4$728 USD
Retailer 13$939 USD
Retailer 10$940 USD
Retailer 3$1,022 USD
Retailer 12$1,063 USD
Retailer 7$1,082 USD
Retailer 6$1,203 USD
Retailer 8$1,211 USD
Retailer 5$1,325 USD
Retailer 11$1,389 USD
Retailer 9$1,703 USD
NZ Jewellers$2,916 USD

22 data points across 13 retailers

13 retailers$700 USD to $2,916 USD

A
Cheapest Retailer
-
$700 USD
₹66,642 INR
A
Retailer 2
-
$728 USD
View
Final sale: no returns
B+
Retailer 3
-
$939 USD
View
B+
Retailer 4
-
$940 USD
View
B+
Retailer 5
-
$1,022 USD
View
B+
Retailer 6
-
$1,063 USD
View
B+
Retailer 7
-
$1,082 USD
£852 GBP
View
B+
Retailer 8
-
$1,203 USD
£947 GBP
View
B+
Retailer 9
-
$1,211 USD
€1,153 EUR
View
Retailer 10
-
$1,325 USD
A$2,038 AUD
View
Price last confirmed 29 days ago
B
Retailer 11
-
$1,389 USD
ZAR 22,433 ZAR
View
B
Retailer 12
-
$1,703 USD
£1,341 GBP
View
Most Expensive
B
NZ Jewellers
32482787-982f-4cf7-b41c-92ed8cc2a066 · Oct 30
$2,916 USD
View
12 more retailers have this diamond
Prices start from $700 USDSave up to $2,216 USD

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
$700 USD