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Cushion|Natural|GIA

1.80ct K SI1 Cushion Natural Diamond

ID • K/SI1 • GIA 7543767304

Certificate GIA 7543767304

Diamond specifications and retailer prices

From £3,425 GBP
As of November 5, 2026
Save £2,274 GBP (40%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £5,700 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.8ct natural cushion diamond

This 1.8ct natural cushion sits in the one-and-a-half to two carat band, graded K 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 7543767304. Listed at 6 retailers as of November 4, 2026, with prices from £3,425 to £5,700, a £2,274 spread on the same certified stone. MOH London lists it at £5,700. 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

1.80
Carat
K
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7543767304
Dimensions7.60 × 6.24 × 4.37 mm
L/W Ratio1.22
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Needle
Top View
7.60 mm6.24 mm1.80 ctK / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7543767304
Side View
Table 61.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 70.0%

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: £5,700 GBP|Low: £3,384 GBP|High: £5,784 GBP|Avg: £4,132 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6£3,425 GBP
Retailer 3£3,533 GBP
Retailer 5£3,588 GBP
Retailer 2£4,037 GBP
Retailer 4£4,378 GBP
MOH London£5,700 GBP

45 data points across 6 retailers

6 retailers£3,425 GBP to £5,700 GBP

B+
Cheapest Retailer
-
£3,425 GBP
B+
Retailer 2
-
£3,533 GBP
View
Retailer 3
-
£3,588 GBP
View
Price last confirmed 12 days ago
B
Retailer 4
-
£4,037 GBP
View
B+
Retailer 5
-
£4,378 GBP
View
Most Expensive
B
MOH London
12A5A05EC · Nov 4
£5,700 GBP
View
5 more retailers have this diamond
Prices start from £3,425 GBPSave up to £2,274 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+
1.80ct Cushion
£3,425 GBP