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Round|Natural|GIA

0.30ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1377580731

Certificate GIA 1377580731

Diamond specifications and retailer prices

From $256 AUD
As of November 6, 2026
Save $1,074 AUD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,330 AUD at NZ Jewellers · As of November 4, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1377580731. Listed at 16 retailers as of November 4, 2026, with prices from $256 to $1,330, a $1,074 spread on the same certified stone. NZ Jewellers lists it at $1,330. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1377580731
Dimensions4.34 × 4.31 × 2.69 mm
L/W Ratio1.01
Star length50%
Key to symbols
Crystal, Feather
Top View
4.34 mm4.31 mm0.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1377580731
Side View
Table 56.0%Crown 35.5°Girdle: ThinPavilion 41.2°Culet: NoneDepth 62.1%

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: Nov 6
Current: $316 AUD|Low: $256 AUD|High: $686 AUD|Avg: $469 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9$256 AUD
Retailer 5$300 AUD
Retailer 1$316 AUD
Retailer 8$380 AUD
Retailer 7$384 AUD
Retailer 4$457 AUD
Retailer 3$513 AUD
Retailer 2$621 AUD
Retailer 6$676 AUD

40 data points across 9 retailers

16 retailers$256 AUD to $1,330 AUD

A
Cheapest Retailer
-
$256 AUD
A
Retailer 2
-
$294 AUD
View
A
Retailer 3
-
$300 AUD
View
Retailer 4
-
$316 AUD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$316 AUD
View
A
Retailer 6
-
$327 AUD
View
A
Retailer 7
-
$369 AUD
View
A
Retailer 8
-
$380 AUD
View
A
Retailer 9
-
$384 AUD
View
A
Retailer 10
-
$396 AUD
View
B+
Retailer 11
-
$457 AUD
View
B+
Retailer 12
-
$479 AUD
View
B+
Retailer 13
-
$513 AUD
View
B+
Retailer 14
-
$621 AUD
View
B
Retailer 15
-
$676 AUD
View
Most Expensive
B
NZ Jewellers
ff69c0e4-b614-4989-a8d1-cae0109d269d · Nov 4
$1,330 AUD
$931 USD
View
15 more retailers have this diamond
Prices start from $256 AUDSave up to $1,074 AUD

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
$256 AUD