Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 7478044614

Certificate GIA 7478044614

Diamond specifications and retailer prices

From $285 USD
As of October 28, 2026
Save $668 USD (70%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,207 USD at NZ Jewellers · As of October 29, 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 7478044614. Listed at 19 retailers as of October 28, 2026, with a 234% 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
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7478044614
Dimensions4.29 × 4.27 × 2.62 mm
L/W Ratio1.00
Star length45%
Lower girdle75%
Top View
4.29 mm4.27 mm0.30 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7478044614
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.3%

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 28
Current: $488 USD|Low: $336 USD|High: $735 USD|Avg: $514 USD|+1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7$337 USD
Retailer 3$402 USD
Retailer 1$488 USD
Retailer 6$504 USD
Retailer 4$526 USD
Retailer 2$639 USD
Retailer 5$732 USD

37 data points across 7 retailers

19 retailers$285 USD to $953 USD

A
Cheapest Retailer
-
$285 USD
A
Retailer 2
-
$297 USD
View
Retailer 3
-
$301 USD
View
Price last confirmed 44 days ago
B+
Retailer 4
-
$307 USD
View
B+
Retailer 5
-
$318 USD
View
B+
Retailer 6
-
$330 USD
View
B+
Retailer 7
-
$357 USD
View
B+
Retailer 8
-
$378 USD
View
B+
Retailer 9
-
$384 USD
View
B
Retailer 10
-
$402 USD
£317 GBP
View
B
Retailer 11
-
$408 USD
View
B+
Retailer 12
-
$416 USD
View
B
Retailer 13
-
$488 USD
ZAR 7,884 ZAR
View
Retailer 14
-
$504 USD
A$776 AUD
View
Price last confirmed 26 days ago
B
Retailer 15
-
$526 USD
€501 EUR
View
B
Retailer 16
-
$639 USD
£503 GBP
View
B
Retailer 17
-
$732 USD
£576 GBP
View
B
Retailer 18
-
$953 USD
CA$1,323 CAD
View
Most Expensive
NZ Jewellers
ad9006a4-52cd-4368-908c-5c84af0fb9fd · Oct 29
$1,207 USD
View
Price under review
18 more retailers have this diamond
Prices start from $285 USDSave up to $668 USD

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
$285 USD