Round|Natural|GIA

0.30ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 5553182525

Certificate GIA 5553182525

Diamond specifications and retailer prices

From £294 GBP
$394 USD
As of October 31, 2026
Save £512 GBP (64%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,196 GBP at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 0.3ct natural round diamond

This 0.3ct 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 5553182525. Listed at 18 retailers as of October 27, 2026, with a 174% 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

0.30
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5553182525
Dimensions4.27 × 2.67 × 2.67 mm
L/W Ratio1.60
Top View
4.27 mm2.67 mm0.30 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553182525
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.8%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: £475 GBP|Low: £253 GBP|High: £806 GBP|Avg: £419 GBP|+9.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 8£253 GBP
Retailer 2£294 GBP
Retailer 5£300 GBP
Retailer 6£330 GBP
Retailer 4£348 GBP
Retailer 13£358 GBP
Retailer 15£358 GBP
Retailer 3£372 GBP
Retailer 16£373 GBP
Retailer 7£376 GBP
Retailer 10£385 GBP
Retailer 1£475 GBP
Retailer 11£484 GBP
Retailer 9£632 GBP
Retailer 12£724 GBP
Retailer 14£806 GBP

26 data points across 16 retailers

18 retailers£294 GBP to £806 GBP

Retailer 1
-
£265 GBP
$356 USD
Price last confirmed 46 days ago
Retailer 2
-
£283 GBP
$379 USD
View
Price last confirmed 10 days ago
B+
Retailer 3
-
£294 GBP
$394 USD
View
Retailer 4
-
£305 GBP
$408 USD
View
Price last confirmed 16 days ago
Retailer 5
-
£316 GBP
$423 USD
View
Price last confirmed 10 days ago
B+
Retailer 6
-
£346 GBP
$463 USD
View
B+
Retailer 7
-
£358 GBP
$480 USD
View
B+
Retailer 8
-
£358 GBP
$480 USD
View
B
Retailer 9
-
£372 GBP
$498 USD
View
B+
Retailer 10
-
£373 GBP
$500 USD
View
Retailer 11
-
£381 GBP
$510 USD
View
Price last confirmed 12 days ago
B+
Retailer 12
-
£385 GBP
View
B
Retailer 13
-
£475 GBP
€606 EUR
View
B
Retailer 14
-
£484 GBP
ZAR 10,475 ZAR
View
B
Retailer 15
-
£632 GBP
View
B
Retailer 16
-
£724 GBP
View
B
Retailer 17
-
£806 GBP
View
Most Expensive
NZ Jewellers
a6c58f02-6568-476a-82a9-414cc1868616 · Oct 20
£1,196 GBP
$1,603 USD
View
Price under review
17 more retailers have this diamond
Prices start from £294 GBPSave up to £512 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+
0.30ct Round
£294 GBP