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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 €624 EUR
₹66,642 INR
As of November 2, 2026
Save €1,976 EUR (76%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €2,600 EUR 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 €624 to €2,600, a €1,976 spread on the same certified stone. NZ Jewellers lists it at €2,600. 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: €2,600 EUR|Low: €554 EUR|High: €2,600 EUR|Avg: €1,063 EUR
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€624 EUR
Retailer 4€649 EUR
Retailer 13€837 EUR
Retailer 10€838 EUR
Retailer 3€911 EUR
Retailer 12€948 EUR
Retailer 2€965 EUR
Retailer 7€1,073 EUR
Retailer 8€1,079 EUR
Retailer 5€1,181 EUR
Retailer 11€1,238 EUR
Retailer 9€1,518 EUR
NZ Jewellers€2,600 EUR

23 data points across 13 retailers

13 retailers€624 EUR to €2,600 EUR

A
Cheapest Retailer
-
€624 EUR
₹66,642 INR
A
Retailer 2
-
€649 EUR
$728 USD
View
Final sale: no returns
B+
Retailer 3
-
€837 EUR
$939 USD
View
B+
Retailer 4
-
€838 EUR
$940 USD
View
B+
Retailer 5
-
€911 EUR
$1,022 USD
View
B+
Retailer 6
-
€948 EUR
$1,063 USD
View
B+
Retailer 7
-
€965 EUR
£852 GBP
View
B+
Retailer 8
-
€1,073 EUR
£947 GBP
View
B+
Retailer 9
-
€1,079 EUR
View
Retailer 10
-
€1,181 EUR
A$2,038 AUD
View
Price last confirmed 30 days ago
B
Retailer 11
-
€1,238 EUR
ZAR 22,433 ZAR
View
B
Retailer 12
-
€1,518 EUR
£1,341 GBP
View
Most Expensive
B
NZ Jewellers
32482787-982f-4cf7-b41c-92ed8cc2a066 · Oct 30
€2,600 EUR
$2,916 USD
View
12 more retailers have this diamond
Prices start from €624 EURSave up to €1,976 EUR

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
€624 EUR