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Cushion|Natural|GIA

1.55ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 7556423959

Certificate GIA 7556423959

Diamond specifications and retailer prices

From £1,431 GBP
As of November 6, 2026
Save £262 GBP (15%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,694 GBP at GemTrove · As of November 6, 2026
View at GemTrove

About this 1.55ct natural cushion diamond

This 1.55ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7556423959. Listed at 6 retailers as of November 6, 2026, with prices from £1,431 to £1,694, a £262 spread on the same certified stone. GemTrove lists it at £1,694. 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

1.55
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7556423959
Dimensions6.50 × 6.35 × 4.31 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal, Cloud, Needle, Indented Natural
Top View
6.50 mm6.35 mm1.55 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7556423959
Side View
Table 63.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.9%

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 6
Current: £1,694 GBP|Low: £1,287 GBP|High: £1,827 GBP|Avg: £1,559 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 3£1,431 GBP
Retailer 4£1,440 GBP
Retailer 6£1,455 GBP
Retailer 2£1,558 GBP
Retailer 5£1,662 GBP
GemTrove£1,694 GBP

40 data points across 6 retailers

6 retailers£1,431 GBP to £1,694 GBP

A
Cheapest Retailer
-
£1,431 GBP
A
Retailer 2
-
£1,440 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,455 GBP
View
A
Retailer 4
-
£1,558 GBP
View
A
Retailer 5
-
£1,662 GBP
View
Most Expensive
B+
GemTrove
GT-N-00952899-98 · Nov 6
£1,694 GBP
A$3,488 AUD
View
5 more retailers have this diamond
Prices start from £1,431 GBPSave up to £262 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
1.55ct Cushion
£1,431 GBP