Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6545505052

Certificate GIA 6545505052

Diamond specifications and retailer prices

From $3,794 USD
As of October 31, 2026
Save $4,140 USD (52%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,934 USD at MOH London · As of November 1, 2026
View at MOH London

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 6545505052. Listed at 20 retailers as of October 31, 2026, with prices from $3,794 to $7,934, a $4,140 spread on the same certified stone. MOH London lists it at $7,934. 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
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 6545505052
Dimensions6.54 × 6.46 × 4.50 mm
L/W Ratio1.01
Top View
6.54 mm6.46 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6545505052
Side View
Table 62.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.6%

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: Oct 31
Current: $7,934 USD|Low: $3,794 USD|High: $8,029 USD|Avg: $5,161 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$3,794 USD
Retailer 7$3,966 USD
Retailer 10$4,270 USD
Retailer 8$4,512 USD
Retailer 11$4,771 USD
Retailer 4$4,953 USD
Retailer 6$5,021 USD
Retailer 3$5,498 USD
Retailer 2$5,635 USD
Retailer 5$6,123 USD
MOH London$7,934 USD

44 data points across 11 retailers

20 retailers$3,794 USD to $7,934 USD

A
Cheapest Retailer
-
$3,794 USD
A
Retailer 2
-
$3,892 USD
View
A
Retailer 3
-
$3,936 USD
View
A
Retailer 4
-
$3,966 USD
View
Final sale: no returns
A
Retailer 5
-
$3,981 USD
View
A
Retailer 6
-
$4,261 USD
CA$5,918 CAD
View
A
Retailer 7
-
$4,270 USD
View
A
Retailer 8
-
$4,391 USD
View
B+
Retailer 9
-
$4,512 USD
View
B+
Retailer 10
-
$4,587 USD
View
B+
Retailer 11
-
$4,751 USD
View
B+
Retailer 12
-
$4,771 USD
View
B+
Retailer 13
-
$4,953 USD
£3,900 GBP
View
Retailer 14
-
$5,021 USD
A$7,725 AUD
View
Price last confirmed 23 days ago
Retailer 15
-
$5,498 USD
View
Price last confirmed 10 days ago
B+
Retailer 16
-
$5,635 USD
€5,367 EUR
View
B+
Retailer 17
-
$5,734 USD
View
B
Retailer 18
-
$6,123 USD
ZAR 98,910 ZAR
View
B
Retailer 19
-
$7,209 USD
View
Most Expensive
B
MOH London
8012FE3A7 · Nov 1
$7,934 USD
£6,247 GBP
View
19 more retailers have this diamond
Prices start from $3,794 USDSave up to $4,140 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
1.51ct Cushion
$3,794 USD