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Radiant|Natural|GIA

1.55ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1379588664

Certificate GIA 1379588664

Diamond specifications and retailer prices

From £6,335 GBP
As of November 6, 2026
Save £3,105 GBP (33%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £9,440 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.55ct natural radiant diamond

This 1.55ct natural radiant sits in the one-and-a-half to two carat band, graded I 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 1379588664. Listed at 3 retailers as of November 4, 2026, with prices from £6,335 to £9,440, a £3,105 spread on the same certified stone. MOH London lists it at £9,440. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1379588664
Dimensions8.11 × 6.08 × 3.96 mm
L/W Ratio1.33
Culet sizeNone
Cert comments
Additional pinpoints internal graining and surface graining are not shown.
Top View
8.11 mm6.08 mm1.55 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1379588664
Side View
Table 66.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 65.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: £9,440 GBP|Low: £6,334 GBP|High: £9,516 GBP|Avg: £7,457 GBP|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 3£6,335 GBP
Retailer 4£6,725 GBP
Retailer 2£7,379 GBP
MOH London£9,440 GBP

14 data points across 4 retailers

3 retailers£6,335 GBP to £9,440 GBP

B+
Cheapest Retailer
-
£6,335 GBP
B
Retailer 2
-
£7,379 GBP
View
Most Expensive
B
MOH London
447CDE6AC · Nov 4
£9,440 GBP
View
2 more retailers have this diamond
Prices start from £6,335 GBPSave up to £3,105 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+
1.55ct Radiant
£6,335 GBP