Round|Natural|GIA

0.30ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 6421167345

Certificate GIA 6421167345

Diamond specifications and retailer prices

From $510 SGD
$399 USD
As of October 28, 2026
Save $745 SGD (59%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $1,255 SGD at MOH London · As of October 29, 2026
View at MOH London

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 6421167345. Listed at 28 retailers as of October 28, 2026, with prices from $510 to $1,255, a $745 spread on the same certified stone. MOH London lists it at $1,255. 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 angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6421167345
Dimensions4.29 × 4.26 × 2.67 mm
L/W Ratio1.01
Top View
4.29 mm4.26 mm0.30 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6421167345
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.4%

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 28
Current: $1,255 SGD|Low: $510 SGD|High: $1,263 SGD|Avg: $805 SGD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 9$510 SGD
Retailer 6$527 SGD
Retailer 10$593 SGD
Retailer 4$666 SGD
Retailer 7$725 SGD
Retailer 5$827 SGD
Retailer 2$838 SGD
Retailer 8$866 SGD
Retailer 3$1,097 SGD
MOH London$1,255 SGD

42 data points across 10 retailers

28 retailers$510 SGD to $1,255 SGD

Retailer 1
-
$490 SGD
$383 USD
Price last confirmed 23 days ago
Retailer 2
-
$490 SGD
$383 USD
View
Price last confirmed 43 days ago
Retailer 3
-
$490 SGD
$383 USD
View
Price last confirmed 9 days ago
B+
Retailer 4
-
$510 SGD
$399 USD
View
Retailer 5
-
$511 SGD
$400 USD
View
Price last confirmed 76 days ago
B
Retailer 6
-
$527 SGD
$412 USD
View
Retailer 7
-
$527 SGD
$412 USD
View
Price last confirmed 15 days ago
Retailer 8
-
$546 SGD
$427 USD
View
Price last confirmed 32 days ago
B
Retailer 9
-
$626 SGD
$490 USD
View
B
Retailer 10
-
$626 SGD
$490 USD
View
B
Retailer 11
-
$639 SGD
$500 USD
View
B
Retailer 12
-
$642 SGD
$502 USD
View
Retailer 13
-
$660 SGD
$516 USD
View
Price last confirmed 22 days ago
Retailer 14
-
$660 SGD
$516 USD
View
Price last confirmed 39 days ago
Retailer 15
-
$660 SGD
$516 USD
View
Price last confirmed 10 days ago
B
Retailer 16
-
$660 SGD
$516 USD
View
B
Retailer 17
-
$666 SGD
£410 GBP
View
B
Retailer 18
-
$725 SGD
$567 USD
View
B
Retailer 19
-
$821 SGD
$643 USD
View
B
Retailer 20
-
$827 SGD
€616 EUR
View
B
Retailer 21
-
$838 SGD
ZAR 10,588 ZAR
View
Retailer 22
-
$866 SGD
A$1,042 AUD
View
Price last confirmed 27 days ago
B
Retailer 23
-
$1,097 SGD
£676 GBP
View
Most Expensive
B
MOH London
1F2E23EE1 · Oct 29
$1,255 SGD
£773 GBP
View
23 more retailers have this diamond
Prices start from $510 SGDSave up to $745 SGD

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
$510 SGD