Round|Natural|GIA

0.37ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1558136606

Certificate GIA 1558136606

Diamond specifications and retailer prices

From £312 GBP
$418 USD
As of October 31, 2026
Save £593 GBP (66%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,267 GBP at NZ Jewellers · As of September 24, 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 1558136606. Listed at 20 retailers as of October 27, 2026, with a 190% 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 angle32.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1558136606
Dimensions4.66 × 4.68 × 2.82 mm
L/W Ratio1.00
Culet sizeNone
Top View
4.66 mm4.68 mm0.37 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558136606
Side View
Table 59.0%Crown 32.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.4%

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: £763 GBP|Low: £359 GBP|High: £910 GBP|Avg: £563 GBP|-0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 7£364 GBP
Retailer 3£409 GBP
Retailer 2£499 GBP
Retailer 4£513 GBP
Retailer 6£530 GBP
Retailer 1£763 GBP
Retailer 5£905 GBP

42 data points across 7 retailers

20 retailers£312 GBP to £905 GBP

Retailer 1
-
£299 GBP
$401 USD
Price last confirmed 24 days ago
Retailer 2
-
£299 GBP
$401 USD
View
Price last confirmed 44 days ago
A
Retailer 3
-
£312 GBP
$418 USD
View
Retailer 4
-
£322 GBP
$432 USD
View
Price last confirmed 33 days ago
Retailer 5
-
£322 GBP
$432 USD
View
Price last confirmed 24 days ago
Retailer 6
-
£346 GBP
$463 USD
View
Price last confirmed 40 days ago
Retailer 7
-
£346 GBP
$463 USD
View
Price last confirmed 22 days ago
B+
Retailer 8
-
£381 GBP
$510 USD
View
B+
Retailer 9
-
£381 GBP
$510 USD
View
B+
Retailer 10
-
£388 GBP
$520 USD
View
B+
Retailer 11
-
£396 GBP
$530 USD
View
B+
Retailer 12
-
£409 GBP
View
B
Retailer 13
-
£499 GBP
$668 USD
View
B+
Retailer 14
-
£499 GBP
€637 EUR
View
B+
Retailer 15
-
£513 GBP
ZAR 11,096 ZAR
View
Retailer 16
-
£530 GBP
A$1,092 AUD
View
Price last confirmed 27 days ago
B
Retailer 17
-
£763 GBP
View
B
Retailer 18
-
£905 GBP
View
Retailer 19
-
£1,267 GBP
$1,698 USD
View
Price under review
Most Expensive
NZ Jewellers
42eeb52f-6d19-4a74-a071-6b0341b5dbb2 · Sep 24
£1,267 GBP
$1,698 USD
View
Price under review
19 more retailers have this diamond
Prices start from £312 GBPSave up to £593 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
£312 GBP