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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

ID • H/SI1 • GIA 6565025664

Certificate GIA 6565025664

Diamond specifications and retailer prices

From €2,579 EUR
HK$22,600 HKD
As of November 1, 2026
Save €7,877 EUR (75%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €10,456 EUR at William & Sons Jewelers · As of November 2, 2026
View at William & Sons Jewelers

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6565025664. Listed at 20 retailers as of November 1, 2026, with prices from €2,579 to €10,456, a €7,877 spread on the same certified stone. William & Sons Jewelers lists it at €10,456. 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
H
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle35.9°
OriginNatural
Grading LabGIA
CertificateGIA 6565025664
Dimensions6.77 × 6.44 × 4.39 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizeNone
Top View
6.77 mm6.44 mm1.51 ctH / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565025664
Side View
Table 64.0%Crown 33.2°Girdle: MED-THKPavilion 35.9°Culet: NDepth 68.1%

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 1
Current: €3,900 EUR|Low: €2,460 EUR|High: €13,152 EUR|Avg: €4,195 EUR|+13.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
William & Sons Jewelers
November 2, 2026
Retailer 15€2,579 EUR
Retailer 3€2,652 EUR
Retailer 7€2,657 EUR
Retailer 13€2,718 EUR
Retailer 12€2,743 EUR
Retailer 17€2,791 EUR
Retailer 10€2,997 EUR
Retailer 16€3,301 EUR
Retailer 18€3,486 EUR
Retailer 19€3,486 EUR
Retailer 2€3,602 EUR
Retailer 8€3,646 EUR
Retailer 1€3,900 EUR
Retailer 5€3,969 EUR
Retailer 6€4,015 EUR
Retailer 14€4,039 EUR
Retailer 11€4,105 EUR
Retailer 9€5,746 EUR
Retailer 4€10,302 EUR
William & Sons Jewelers€10,456 EUR

26 data points across 20 retailers

20 retailers€2,579 EUR to €10,456 EUR

A
Cheapest Retailer
-
€2,579 EUR
HK$22,600 HKD
A
Retailer 2
-
€2,652 EUR
$2,975 USD
View
A
Retailer 3
-
€2,718 EUR
$3,048 USD
View
A
Retailer 4
-
€2,743 EUR
$3,076 USD
View
A
Retailer 5
-
€2,791 EUR
$3,130 USD
View
Retailer 6
-
€2,997 EUR
$3,361 USD
View
Price last confirmed 25 days ago
Retailer 7
-
€3,204 EUR
SGD 4,857 SGD
View
Price last confirmed 24 days ago
A
Retailer 8
-
€3,301 EUR
$3,702 USD
View
A
Retailer 9
-
€3,486 EUR
$3,910 USD
View
A
Retailer 10
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€3,486 EUR
$3,910 USD
View
Retailer 11
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€3,566 EUR
$4,000 USD
View
Price last confirmed 25 days ago
A
Retailer 12
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€3,602 EUR
$4,040 USD
View
Retailer 13
-
€3,646 EUR
A$6,292 AUD
View
Price last confirmed 24 days ago
A
Retailer 14
-
€3,806 EUR
A$6,568 AUD
View
B+
Retailer 15
-
€3,900 EUR
£3,445 GBP
View
A
Retailer 16
-
€4,039 EUR
$4,530 USD
View
Retailer 17
-
€4,105 EUR
ZAR 74,372 ZAR
View
Price last confirmed 33 days ago
Retailer 18
-
€5,746 EUR
£5,075 GBP
View
Price last confirmed 25 days ago
Retailer 19
-
€10,302 EUR
$11,555 USD
View
Price last confirmed 9 days ago
Most Expensive
C
William & Sons Jewelers
cert_6565025664 · Nov 2
€10,456 EUR
$11,728 USD
View
Final sale: no returns
19 more retailers have this diamond
Prices start from €2,579 EURSave up to €7,877 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
1.51ct Cushion
€2,579 EUR