CaratHunter
Plans
Cushion|Natural|GIA

0.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6521626623

Certificate GIA 6521626623

Diamond specifications and retailer prices

From €366 EUR
As of November 6, 2026
Save €696 EUR (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €1,062 EUR at MOH London · As of November 7, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion 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 stated by the retailer rather than the lab and certified by GIA 6521626623. Listed at 13 retailers as of November 6, 2026, with prices from €366 to €1,062, a €696 spread on the same certified stone. MOH London lists it at €1,062. 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

0.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6521626623
Dimensions5.01 × 4.55 × 2.99 mm
L/W Ratio1.10
Top View
5.01 mm4.55 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6521626623
Side View
Table 64.0%CrownGirdle: MED-MEDPavilionCulet: NoneDepth 65.7%

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 6
Current: €1,062 EUR|Low: €288 EUR|High: €1,076 EUR|Avg: €610 EUR|-0.3%
MOH London
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 7, 2026
Retailer 13€366 EUR
Retailer 11€426 EUR
Retailer 7€481 EUR
Retailer 9€534 EUR
Retailer 2€573 EUR
Retailer 12€576 EUR
Retailer 10€591 EUR
Retailer 4€640 EUR
Retailer 3€648 EUR
Retailer 6€688 EUR
Retailer 5€691 EUR
Retailer 8€717 EUR
MOH London€1,062 EUR

45 data points across 13 retailers

13 retailers€366 EUR to €1,062 EUR

A
Cheapest Retailer
-
€366 EUR
A
Retailer 2
-
€426 EUR
View
Final sale: no returns
B+
Retailer 3
-
€481 EUR
View
B+
Retailer 4
-
€534 EUR
View
B+
Retailer 5
-
€573 EUR
View
B+
Retailer 6
-
€576 EUR
View
B+
Retailer 7
-
€591 EUR
View
B
Retailer 8
-
€640 EUR
View
B
Retailer 9
-
€648 EUR
View
B+
Retailer 10
-
€688 EUR
View
Retailer 11
-
€691 EUR
View
Price last confirmed 35 days ago
B+
Retailer 12
-
€717 EUR
View
Most Expensive
B
MOH London
73DB74BBB · Nov 7
€1,062 EUR
£934 GBP
View
12 more retailers have this diamond
Prices start from €366 EURSave up to €696 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
0.51ct Cushion
€366 EUR