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Cushion|Natural|GIA

1.51ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 1553050279

Certificate GIA 1553050279

Diamond specifications and retailer prices

From £2,340 GBP
HK$24,500 HKD
As of November 1, 2026
Save £2,960 GBP (56%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £5,300 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 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 1553050279. Listed at 10 retailers as of November 1, 2026, with prices from £2,340 to £5,300, a £2,960 spread on the same certified stone. MOH London lists it at £5,300. 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
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle36.22°
OriginNatural
Grading LabGIA
CertificateGIA 1553050279
Dimensions7.56 × 5.92 × 4.14 mm
L/W Ratio1.28
Key to symbols
Feather, Crystal, Needle
Top View
7.56 mm5.92 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553050279
Side View
Table 65.0%CrownGirdle: STK-VTKPavilion 36.22°Culet: NoneDepth 69.9%

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 1
Current: £5,300 GBP|Low: £2,321 GBP|High: £5,453 GBP|Avg: £3,338 GBP|-2.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 6£2,340 GBP
Retailer 4£2,742 GBP
Retailer 5£2,819 GBP
Retailer 2£2,936 GBP
Retailer 8£2,955 GBP
Retailer 9£3,221 GBP
Retailer 7£3,385 GBP
Retailer 3£3,627 GBP
MOH London£5,300 GBP

35 data points across 9 retailers

10 retailers£2,340 GBP to £5,300 GBP

A
Cheapest Retailer
-
£2,340 GBP
HK$24,500 HKD
A
Retailer 2
-
£2,742 GBP
€3,499 EUR
View
A
Retailer 3
-
£2,819 GBP
$3,777 USD
View
A
Retailer 4
-
£2,936 GBP
View
A
Retailer 5
-
£2,955 GBP
SGD 5,351 SGD
View
A
Retailer 6
-
£3,221 GBP
$4,316 USD
View
Final sale: no returns
A
Retailer 7
-
£3,385 GBP
$4,536 USD
View
B+
Retailer 8
-
£3,409 GBP
A$7,028 AUD
View
B+
Retailer 9
-
£3,627 GBP
€4,628 EUR
View
Most Expensive
B
MOH London
3EE8400D9 · Nov 1
£5,300 GBP
View
9 more retailers have this diamond
Prices start from £2,340 GBPSave up to £2,960 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.

A
1.51ct Cushion
£2,340 GBP