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Radiant|Natural|GIA

1.56ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 2237400920

Certificate GIA 2237400920

Diamond specifications and retailer prices

From £6,285 GBP
As of November 4, 2026
Save £4,069 GBP (39%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £11,079 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.56ct natural radiant diamond

This 1.56ct 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 2237400920. Listed at 8 retailers as of November 4, 2026, with a 65% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.56
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2237400920
Dimensions7.31 × 6.16 × 4.22 mm
L/W Ratio1.19
Culet sizeNone
Top View
7.31 mm6.16 mm1.56 ctI / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 2237400920
Side View
Table 65.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £11,079 GBP|Low: £6,647 GBP|High: £11,079 GBP|Avg: £8,363 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 7, 2026
Retailer 7£6,647 GBP
Retailer 6£7,201 GBP
Retailer 2£7,270 GBP
Retailer 5£7,312 GBP
Retailer 8£8,309 GBP
Retailer 3£8,328 GBP
Retailer 4£10,353 GBP
NZ Jewellers£11,079 GBP

45 data points across 8 retailers

8 retailers£6,285 GBP to £10,353 GBP

B+
Cheapest Retailer
-
£6,285 GBP
B
Retailer 2
-
£7,201 GBP
View
B
Retailer 3
-
£7,270 GBP
View
B
Retailer 4
-
£7,312 GBP
View
B
Retailer 5
-
£8,309 GBP
View
B
Retailer 6
-
£8,328 GBP
View
B
Retailer 7
-
£10,353 GBP
View
Most Expensive
NZ Jewellers
30ab24eb-27e8-450a-ba34-a86697730a00 · Oct 30
£11,079 GBP
$14,829 USD
View
Price last confirmed 7 days ago
7 more retailers have this diamond
Prices start from £6,285 GBPSave up to £4,069 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+
1.56ct Radiant
£6,285 GBP