Round|Natural|GIA

0.37ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6555349194

Certificate GIA 6555349194

Diamond specifications and retailer prices

From £306 GBP
$410 USD
As of October 31, 2026
Save £594 GBP (66%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,245 GBP at NZ Jewellers · As of September 21, 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 6555349194. Listed at 16 retailers as of October 27, 2026, with a 194% 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
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6555349194
Dimensions4.57 × 4.59 × 2.86 mm
L/W Ratio1.00
Culet sizeNone
Top View
4.57 mm4.59 mm0.37 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555349194
Side View
Table 57.0%Crown 35.5°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 31
Current: £401 GBP|Low: £354 GBP|High: £905 GBP|Avg: £557 GBP|+6.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 7£357 GBP
Retailer 1£401 GBP
Retailer 2£491 GBP
Retailer 4£504 GBP
Retailer 6£520 GBP
Retailer 3£750 GBP
Retailer 5£900 GBP

43 data points across 7 retailers

16 retailers£306 GBP to £900 GBP

Retailer 1
-
£294 GBP
$394 USD
Price last confirmed 25 days ago
A
Retailer 2
-
£306 GBP
$410 USD
View
Retailer 3
-
£317 GBP
$425 USD
View
Price last confirmed 25 days ago
Retailer 4
-
£317 GBP
$425 USD
View
Price last confirmed 34 days ago
Retailer 5
-
£340 GBP
$455 USD
View
Price last confirmed 23 days ago
Retailer 6
-
£340 GBP
$455 USD
View
Price last confirmed 41 days ago
B+
Retailer 7
-
£383 GBP
$513 USD
View
B+
Retailer 8
-
£401 GBP
View
B+
Retailer 9
-
£491 GBP
€627 EUR
View
B
Retailer 10
-
£491 GBP
$658 USD
View
B+
Retailer 11
-
£504 GBP
ZAR 10,900 ZAR
View
Retailer 12
-
£520 GBP
A$1,072 AUD
View
Price last confirmed 29 days ago
B
Retailer 13
-
£750 GBP
View
B
Retailer 14
-
£900 GBP
View
Retailer 15
-
£1,245 GBP
$1,668 USD
View
Price under review
Most Expensive
NZ Jewellers
c623b98c-aa26-4b28-9a89-3b812fcf63a2 · Sep 21
£1,245 GBP
$1,668 USD
View
Price under review
15 more retailers have this diamond
Prices start from £306 GBPSave up to £594 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
£306 GBP