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Cushion|Natural|GIA

1.05ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 5182654799

Certificate GIA 5182654799

Diamond specifications and retailer prices

From £1,816 GBP
$2,437 USD
As of November 1, 2026
Save £1,928 GBP (51%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,744 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.05ct natural cushion diamond

This 1.05ct natural cushion sits in the classic one-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 5182654799. Listed at 11 retailers as of November 1, 2026, with prices from £1,816 to £3,744, a £1,928 spread on the same certified stone. MOH London lists it at £3,744. 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

1.05
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5182654799
Dimensions5.92 × 5.91 × 4.09 mm
L/W Ratio1.00
Top View
5.92 mm5.91 mm1.05 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5182654799
Side View
Table 57.0%CrownGirdle: MED-THKPavilionCulet: NDepth 69.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £3,744 GBP|Low: £1,997 GBP|High: £3,789 GBP|Avg: £2,562 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£1,997 GBP
Retailer 6£2,028 GBP
Retailer 5£2,392 GBP
Retailer 3£2,394 GBP
Retailer 2£2,620 GBP
Retailer 4£2,752 GBP
MOH London£3,744 GBP

44 data points across 7 retailers

11 retailers£1,816 GBP to £3,744 GBP

B
Cheapest Retailer
-
£1,816 GBP
$2,437 USD
B
Retailer 2
-
£1,997 GBP
$2,680 USD
View
B
Retailer 3
-
£2,028 GBP
$2,722 USD
View
B
Retailer 4
-
£2,300 GBP
$3,086 USD
View
B
Retailer 5
-
£2,317 GBP
$3,109 USD
View
Retailer 6
-
£2,392 GBP
A$4,938 AUD
View
Price last confirmed 25 days ago
B
Retailer 7
-
£2,394 GBP
View
Retailer 8
-
£2,598 GBP
$3,487 USD
View
Price last confirmed 10 days ago
B
Retailer 9
-
£2,620 GBP
€3,349 EUR
View
B
Retailer 10
-
£2,752 GBP
ZAR 59,659 ZAR
View
Most Expensive
B
MOH London
BC771DE4D · Nov 1
£3,744 GBP
View
10 more retailers have this diamond
Prices start from £1,816 GBPSave up to £1,928 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
1.05ct Cushion
£1,816 GBP