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0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 3565704527

Certificate GIA 3565704527

Diamond specifications and retailer prices

From €565 EUR
SGD 857 SGD
As of October 31, 2026
Save €463 EUR (45%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €1,028 EUR at Frank Darling · As of October 30, 2026
View at Frank Darling

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 3565704527. Listed at 10 retailers as of October 30, 2026, with prices from €565 to €1,028, a €463 spread on the same certified stone. Frank Darling lists it at €1,028. 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 angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 3565704527
Dimensions5.53 × 3.47 × 3.47 mm
L/W Ratio1.59
Culet sizeNone
Top View
5.53 mm3.47 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3565704527
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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: Oct 31
Current: €1,028 EUR|Low: €656 EUR|High: €1,028 EUR|Avg: €838 EUR
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 9€656 EUR
Retailer 7€689 EUR
Retailer 2€730 EUR
Retailer 8€852 EUR
Retailer 6€878 EUR
Retailer 3€886 EUR
Retailer 5€917 EUR
Retailer 4€979 EUR
Frank Darling€1,028 EUR

7 data points across 9 retailers

10 retailers€565 EUR to €1,028 EUR

A
Cheapest Retailer
-
€565 EUR
SGD 857 SGD
A
Retailer 2
-
€656 EUR
SGD 994 SGD
View
A
Retailer 3
-
€689 EUR
$773 USD
View
A
Retailer 4
-
€730 EUR
£644 GBP
View
B+
Retailer 5
-
€852 EUR
$956 USD
View
B+
Retailer 6
-
€878 EUR
£775 GBP
View
B+
Retailer 7
-
€886 EUR
View
B+
Retailer 8
-
€917 EUR
$1,028 USD
View
B+
Retailer 9
-
€979 EUR
$1,098 USD
View
Most Expensive
B
Frank Darling
2708874HK · Oct 30
€1,028 EUR
$1,153 USD
View
9 more retailers have this diamond
Prices start from €565 EURSave up to €463 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
€565 EUR