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Cushion|Natural|GIA

1.51ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 2516339828

Certificate GIA 2516339828

Diamond specifications and retailer prices

From £3,113 GBP
$4,171 USD
As of October 31, 2026
Save £3,432 GBP (52%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £6,545 GBP 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 J 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 2516339828. Listed at 25 retailers as of October 31, 2026, with prices from £3,113 to £6,545, a £3,432 spread on the same certified stone. MOH London lists it at £6,545. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.63°
Pavilion angle36.01°
OriginNatural
Grading LabGIA
CertificateGIA 2516339828
Dimensions7.68 × 5.91 × 4.11 mm
L/W Ratio1.30
Top View
7.68 mm5.91 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2516339828
Side View
Table 64.0%Crown 38.63°Girdle: STK-VTKPavilion 36.01°Culet: 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: £6,545 GBP|Low: £2,976 GBP|High: £6,623 GBP|Avg: £4,205 GBP
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 10£3,113 GBP
Retailer 7£3,273 GBP
Retailer 11£3,504 GBP
Retailer 8£3,723 GBP
Retailer 9£3,917 GBP
Retailer 2£4,009 GBP
Retailer 6£4,116 GBP
Retailer 3£4,535 GBP
Retailer 5£4,651 GBP
Retailer 4£5,051 GBP
MOH London£6,545 GBP

43 data points across 11 retailers

25 retailers£3,113 GBP to £6,545 GBP

B+
Cheapest Retailer
-
£3,113 GBP
$4,171 USD
B+
Retailer 2
-
£3,210 GBP
$4,301 USD
View
B+
Retailer 3
-
£3,247 GBP
$4,350 USD
View
B+
Retailer 4
-
£3,273 GBP
$4,386 USD
View
Final sale: no returns
B+
Retailer 5
-
£3,286 GBP
$4,403 USD
View
B
Retailer 6
-
£3,389 GBP
A$6,986 AUD
View
B
Retailer 7
-
£3,490 GBP
CA$6,495 CAD
View
B
Retailer 8
-
£3,497 GBP
$4,685 USD
View
B
Retailer 9
-
£3,504 GBP
$4,695 USD
View
B+
Retailer 10
-
£3,688 GBP
$4,942 USD
View
B
Retailer 11
-
£3,723 GBP
$4,988 USD
View
B
Retailer 12
-
£3,787 GBP
$5,074 USD
View
B
Retailer 13
-
£3,917 GBP
$5,248 USD
View
B
Retailer 14
-
£3,922 GBP
$5,255 USD
View
B
Retailer 15
-
£4,009 GBP
View
Retailer 16
-
£4,116 GBP
A$8,484 AUD
View
Price last confirmed 23 days ago
B
Retailer 17
-
£4,172 GBP
$5,590 USD
View
B
Retailer 18
-
£4,172 GBP
$5,590 USD
View
B
Retailer 19
-
£4,306 GBP
$5,770 USD
View
Retailer 20
-
£4,535 GBP
$6,076 USD
View
Price last confirmed 10 days ago
B
Retailer 21
-
£4,651 GBP
€5,935 EUR
View
B
Retailer 22
-
£4,733 GBP
$6,342 USD
View
B
Retailer 23
-
£5,051 GBP
ZAR 109,332 ZAR
View
B
Retailer 24
-
£5,950 GBP
$7,973 USD
View
Most Expensive
B
MOH London
66A04432A · Nov 1
£6,545 GBP
View
24 more retailers have this diamond
Prices start from £3,113 GBPSave up to £3,432 GBP

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
£3,113 GBP