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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 2225656240

Certificate GIA 2225656240

Diamond specifications and retailer prices

From $7,022 USD
As of October 31, 2026
Save $6,175 USD (47%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $13,197 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 2225656240. Listed at 24 retailers as of October 31, 2026, with prices from $7,022 to $13,197, a $6,175 spread on the same certified stone. MOH London lists it at $13,197. 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
SymmetryVery Good
FluorescenceNone
Crown angle35.57°
Pavilion angle40.44°
OriginNatural
Grading LabGIA
CertificateGIA 2225656240
Dimensions6.79 × 6.63 × 4.44 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.79 mm6.63 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2225656240
Side View
Table 68.0%Crown 35.57°Girdle: THK-VTKPavilion 40.44°Culet: NoneDepth 67.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $13,197 USD|Low: $6,901 USD|High: $13,355 USD|Avg: $9,047 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 1, 2026
Retailer 3$7,022 USD
Retailer 7$7,065 USD
Retailer 9$7,414 USD
Retailer 10$7,918 USD
Retailer 11$7,919 USD
Retailer 8$7,984 USD
Retailer 2$8,838 USD
Retailer 6$8,928 USD
Retailer 5$10,347 USD
Retailer 4$11,633 USD
MOH London$13,197 USD

43 data points across 11 retailers

24 retailers$7,022 USD to $13,197 USD

B+
Cheapest Retailer
-
$7,022 USD
B+
Retailer 2
-
$7,065 USD
View
B
Retailer 3
-
$7,364 USD
View
B
Retailer 4
-
$7,392 USD
A$11,372 AUD
View
B
Retailer 5
-
$7,414 USD
View
B
Retailer 6
-
$7,621 USD
View
B
Retailer 7
-
$7,885 USD
View
B
Retailer 8
-
$7,918 USD
View
Final sale: no returns
B
Retailer 9
-
$7,919 USD
View
B
Retailer 10
-
$7,984 USD
View
B
Retailer 11
-
$8,438 USD
View
B
Retailer 12
-
$8,511 USD
CA$11,820 CAD
View
B
Retailer 13
-
$8,696 USD
A$13,378 AUD
View
B
Retailer 14
-
$8,716 USD
View
B
Retailer 15
-
$8,838 USD
£6,959 GBP
View
Retailer 16
-
$8,928 USD
A$13,736 AUD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$9,270 USD
View
B
Retailer 18
-
$9,270 USD
View
B
Retailer 19
-
$9,471 USD
View
B
Retailer 20
-
$9,580 USD
View
B
Retailer 21
-
$10,347 USD
€9,854 EUR
View
Retailer 22
-
$10,425 USD
View
Price last confirmed 9 days ago
B
Retailer 23
-
$11,633 USD
ZAR 187,930 ZAR
View
Most Expensive
B
MOH London
2FED25E2D · Nov 1
$13,197 USD
£10,391 GBP
View
23 more retailers have this diamond
Prices start from $7,022 USDSave up to $6,175 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.

B+
1.51ct Cushion
$7,022 USD