Round|Natural|GIA

0.37ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6555418322

Certificate GIA 6555418322

Diamond specifications and retailer prices

From £121 GBP
₹15,388 INR
As of October 31, 2026
Save £284 GBP (70%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £855 GBP at NZ Jewellers · As of October 3, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555418322. Listed at 16 retailers as of October 29, 2026, with a 236% 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

0.37
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6555418322
Dimensions4.63 × 4.65 × 2.84 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Cloud
Top View
4.63 mm4.65 mm0.37 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555418322
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £255 GBP|Low: £121 GBP|High: £442 GBP|Avg: £263 GBP|+21.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 4£121 GBP
Retailer 3£153 GBP
Retailer 2£190 GBP
Retailer 11£239 GBP
Retailer 5£252 GBP
Retailer 1£255 GBP
Retailer 7£270 GBP
Retailer 8£271 GBP
Retailer 6£301 GBP
Retailer 10£329 GBP
Retailer 9£405 GBP

29 data points across 11 retailers

16 retailers£121 GBP to £405 GBP

A
Cheapest Retailer
-
£121 GBP
₹15,388 INR
A
Retailer 2
-
£153 GBP
HK$1,600 HKD
View
Retailer 3
-
£189 GBP
$253 USD
View
Price last confirmed 30 days ago
A
Retailer 4
-
£190 GBP
SGD 344 SGD
View
Retailer 5
-
£213 GBP
$285 USD
View
Price last confirmed 32 days ago
A
Retailer 6
-
£239 GBP
View
A
Retailer 7
-
£252 GBP
View
Retailer 8
-
£254 GBP
$341 USD
View
Price last confirmed 29 days ago
A
Retailer 9
-
£255 GBP
$342 USD
View
A
Retailer 10
-
£270 GBP
ZAR 5,845 ZAR
View
A
Retailer 11
-
£271 GBP
$364 USD
View
A
Retailer 12
-
£301 GBP
€384 EUR
View
Retailer 13
-
£303 GBP
A$624 AUD
View
Price last confirmed 28 days ago
A
Retailer 14
-
£329 GBP
$441 USD
View
B+
Retailer 15
-
£405 GBP
View
Most Expensive
NZ Jewellers
027e8b11-d63c-4f8c-b3d1-1d2fb6cd7704 · Oct 3
£855 GBP
$1,146 USD
View
Price last confirmed 28 days ago
15 more retailers have this diamond
Prices start from £121 GBPSave up to £284 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
£121 GBP