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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 $318 NZD
As of November 6, 2026
Save $1,338 NZD (81%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,656 NZD 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 $318 to $1,656, a $1,338 spread on the same certified stone. NZ Jewellers lists it at $1,656. 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: $393 NZD|Low: $318 NZD|High: $854 NZD|Avg: $583 NZD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9$318 NZD
Retailer 5$374 NZD
Retailer 1$393 NZD
Retailer 8$473 NZD
Retailer 7$479 NZD
Retailer 4$569 NZD
Retailer 3$639 NZD
Retailer 2$774 NZD
Retailer 6$841 NZD

40 data points across 9 retailers

16 retailers$318 NZD to $1,656 NZD

A
Cheapest Retailer
-
$318 NZD
A
Retailer 2
-
$366 NZD
View
A
Retailer 3
-
$374 NZD
View
Retailer 4
-
$393 NZD
View
Price last confirmed 8 days ago
A
Retailer 5
-
$393 NZD
View
A
Retailer 6
-
$407 NZD
View
A
Retailer 7
-
$459 NZD
View
A
Retailer 8
-
$473 NZD
View
A
Retailer 9
-
$479 NZD
View
A
Retailer 10
-
$493 NZD
View
B+
Retailer 11
-
$569 NZD
View
B+
Retailer 12
-
$596 NZD
View
B+
Retailer 13
-
$639 NZD
View
B+
Retailer 14
-
$774 NZD
View
B
Retailer 15
-
$841 NZD
View
Most Expensive
B
NZ Jewellers
ff69c0e4-b614-4989-a8d1-cae0109d269d · Nov 4
$1,656 NZD
$931 USD
View
15 more retailers have this diamond
Prices start from $318 NZDSave up to $1,338 NZD

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
$318 NZD