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Round|Natural|GIA

0.37ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2566400203

Certificate GIA 2566400203

Diamond specifications and retailer prices

From £225 GBP
$301 USD
As of October 27, 2026
Save £651 GBP (74%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £875 GBP at NZ Jewellers · As of October 26, 2026
View at NZ Jewellers

About this 0.37ct natural round diamond

This 0.37ct natural round sits in the sub-half-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566400203. Listed at 12 retailers as of October 26, 2026, with prices from £225 to £875, a £651 spread on the same certified stone. NZ Jewellers lists it at £875. 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

0.37
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566400203
Dimensions4.57 × 4.61 × 2.86 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather
Top View
4.57 mm4.61 mm0.37 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2566400203
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.4%

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: Oct 27
Current: £875 GBP|Low: £225 GBP|High: £875 GBP|Avg: £370 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 28, 2026
Retailer 7£225 GBP
Retailer 10£228 GBP
Retailer 12£235 GBP
Retailer 8£246 GBP
Retailer 9£254 GBP
Retailer 6£290 GBP
Retailer 11£307 GBP
Retailer 4£376 GBP
Retailer 2£431 GBP
Retailer 5£472 GBP
Retailer 3£530 GBP
NZ Jewellers£875 GBP

25 data points across 12 retailers

12 retailers£225 GBP to £875 GBP

A
Cheapest Retailer
-
£225 GBP
$301 USD
A
Retailer 2
-
£228 GBP
$306 USD
View
Retailer 3
-
£235 GBP
$315 USD
View
Price last confirmed 10 days ago
A
Retailer 4
-
£246 GBP
$330 USD
View
A
Retailer 5
-
£254 GBP
$341 USD
View
A
Retailer 6
-
£290 GBP
View
A
Retailer 7
-
£307 GBP
$412 USD
View
B+
Retailer 8
-
£376 GBP
$504 USD
View
B+
Retailer 9
-
£431 GBP
€550 EUR
View
B+
Retailer 10
-
£472 GBP
View
Retailer 11
-
£530 GBP
View
Price last confirmed 14 days ago
Most Expensive
B
NZ Jewellers
5338cdf2-69da-4b77-8b26-a82cba24c11f · Oct 26
£875 GBP
$1,173 USD
View
11 more retailers have this diamond
Prices start from £225 GBPSave up to £651 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
0.37ct Round
£225 GBP