Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

VG • H/SI1 • GIA 1428687763

Certificate GIA 1428687763

Diamond specifications and retailer prices

From $4,868 USD
As of October 31, 2026
Save $5,622 USD (54%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $10,490 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 1428687763. Listed at 19 retailers as of October 31, 2026, with prices from $4,868 to $10,490, a $5,622 spread on the same certified stone. MOH London lists it at $10,490. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1428687763
Dimensions6.69 × 5.94 × 4.13 mm
L/W Ratio1.13
Culet sizeNone
Top View
6.69 mm5.94 mm1.51 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1428687763
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 69.5%

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: $10,490 USD|Low: $5,246 USD|High: $10,617 USD|Avg: $7,355 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 3$5,368 USD
Retailer 6$5,895 USD
Retailer 7$6,295 USD
Retailer 8$6,295 USD
Retailer 5$7,306 USD
Retailer 2$8,223 USD
Retailer 4$9,249 USD
MOH London$10,490 USD

44 data points across 8 retailers

19 retailers$4,868 USD to $10,490 USD

B+
Cheapest Retailer
-
$4,868 USD
B+
Retailer 2
-
$5,368 USD
£4,227 GBP
View
B+
Retailer 3
-
$5,413 USD
View
B+
Retailer 4
-
$5,770 USD
View
B+
Retailer 5
-
$5,770 USD
View
B+
Retailer 6
-
$5,895 USD
View
B
Retailer 7
-
$5,947 USD
View
B
Retailer 8
-
$5,960 USD
View
B
Retailer 9
-
$6,295 USD
View
Final sale: no returns
B
Retailer 10
-
$6,295 USD
View
B
Retailer 11
-
$6,320 USD
View
B+
Retailer 12
-
$6,405 USD
View
B
Retailer 13
-
$6,708 USD
View
B
Retailer 14
-
$7,218 USD
View
Retailer 15
-
$7,306 USD
A$11,240 AUD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$8,223 USD
€7,831 EUR
View
Retailer 17
-
$8,294 USD
View
Price last confirmed 10 days ago
B
Retailer 18
-
$9,249 USD
ZAR 149,411 ZAR
View
Most Expensive
B
MOH London
86C3866EA · Nov 1
$10,490 USD
£8,260 GBP
View
18 more retailers have this diamond
Prices start from $4,868 USDSave up to $5,622 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
$4,868 USD