CaratHunter
Plans
Cushion|Natural|GIA

1.40ct M SI1 Cushion Natural Diamond

ID • M/SI1 • GIA 6545712479

Certificate GIA 6545712479

Diamond specifications and retailer prices

From £1,274 GBP
As of November 5, 2026
Save £378 GBP (23%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,652 GBP at Yorxs · As of November 6, 2026
View at Yorxs

About this 1.4ct natural cushion diamond

This 1.4ct natural cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545712479. Listed at 4 retailers as of November 5, 2026, with prices from £1,274 to £1,652, a £378 spread on the same certified stone. Yorxs lists it at £1,652. 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

1.40
Carat
M
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6545712479
Dimensions7.17 × 5.76 × 3.90 mm
L/W Ratio1.24
Top View
7.17 mm5.76 mm1.40 ctM / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6545712479
Side View
Table 61.0%CrownGirdlePavilionCulet: NoneDepth 67.8%

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: Nov 5
Current: £1,485 GBP|Low: £1,127 GBP|High: £1,661 GBP|Avg: £1,364 GBP|+2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 6, 2026
Retailer 4£1,127 GBP
Retailer 2£1,217 GBP
Retailer 3£1,274 GBP
Retailer 1£1,485 GBP
Yorxs£1,652 GBP

25 data points across 5 retailers

4 retailers£1,274 GBP to £1,652 GBP

Retailer 1
-
£1,217 GBP
Price last confirmed 8 days ago
B+
Retailer 2
-
£1,274 GBP
View
B+
Retailer 3
-
£1,485 GBP
View
Most Expensive
B
Yorxs
6CCB2F3DB · Nov 6
£1,652 GBP
€2,106 EUR
View
3 more retailers have this diamond
Prices start from £1,274 GBPSave up to £378 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+
1.40ct Cushion
£1,274 GBP