Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 5493773118

Certificate GIA 5493773118

Diamond specifications and retailer prices

From £176 GBP
₹22,399 INR
As of October 30, 2026
Save £396 GBP (69%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £947 GBP at NZ Jewellers · As of September 24, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5493773118. Listed at 20 retailers as of October 26, 2026, with a 226% 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5493773118
Dimensions4.36 × 4.34 × 2.63 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
4.36 mm4.34 mm0.30 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5493773118
Side View
Table 59.0%Crown 35°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.5%

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 30
Current: £947 GBP|Low: £174 GBP|High: £947 GBP|Avg: £386 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 2£176 GBP
Retailer 10£247 GBP
Retailer 8£254 GBP
Retailer 11£266 GBP
Retailer 3£275 GBP
Retailer 5£317 GBP
Retailer 4£383 GBP
Retailer 9£396 GBP
Retailer 6£411 GBP
Retailer 7£572 GBP
NZ Jewellers£947 GBP

36 data points across 11 retailers

20 retailers£176 GBP to £572 GBP

A
Cheapest Retailer
-
£176 GBP
₹22,399 INR
B+
Retailer 2
-
£234 GBP
$313 USD
View
B+
Retailer 3
-
£247 GBP
$331 USD
View
Retailer 4
-
£247 GBP
$331 USD
View
Price last confirmed 37 days ago
B+
Retailer 5
-
£254 GBP
$340 USD
View
B+
Retailer 6
-
£261 GBP
SGD 472 SGD
View
B+
Retailer 7
-
£266 GBP
$357 USD
View
B+
Retailer 8
-
£275 GBP
$369 USD
View
B+
Retailer 9
-
£317 GBP
View
Retailer 10
-
£333 GBP
$446 USD
View
Price last confirmed 39 days ago
B
Retailer 11
-
£345 GBP
$462 USD
View
B
Retailer 12
-
£360 GBP
$482 USD
View
B
Retailer 13
-
£374 GBP
View
B
Retailer 14
-
£383 GBP
ZAR 8,293 ZAR
View
B
Retailer 15
-
£396 GBP
$530 USD
View
Retailer 16
-
£396 GBP
A$816 AUD
View
Price last confirmed 27 days ago
B
Retailer 17
-
£411 GBP
€524 EUR
View
B
Retailer 18
-
£572 GBP
View
Retailer 19
-
£947 GBP
$1,269 USD
View
Price under review
Most Expensive
NZ Jewellers
5ac0f48f-46ca-490e-a5d4-d5fb15bcfa66 · Sep 24
£947 GBP
$1,269 USD
View
Price under review
19 more retailers have this diamond
Prices start from £176 GBPSave up to £396 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
0.30ct Round
£176 GBP