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Marquise|Lab Grown

0.30ct G SI1 Marquise Lab Grown Diamond

GD • G/SI1 • TA50D-312-1230

Diamond specifications and retailer prices

From $259 NZD
$146 USD
As of November 2, 2026
Save $773 NZD (75%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,033 NZD at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

About this 0.3ct lab-grown marquise diamond

This 0.3ct lab-grown marquise sits in the sub-half-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade. Listed at 4 retailers as of October 31, 2026, with prices from $259 to $1,033, a $773 spread on the same certified stone. NZ Jewellers lists it at $1,033. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.30
Carat
G
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading Lab
CertificateTA50D-312-1230
Dimensions7.16 × 3.41 × 2.01 mm
L/W Ratio2.10
Top View
7.16 mm3.41 mm0.30 ctG / SI1
OriginLab Grown
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateTA50D-312-1230
Side View
Table 65.9%CrownGirdlePavilionCuletDepth 58.9%

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: Nov 2
Current: $1,033 NZD|Low: $249 NZD|High: $1,033 NZD|Avg: $450 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
October 8, 2026
Retailer 2$259 NZD
Retailer 4$300 NZD
Retailer 3$322 NZD
NZ Jewellers$1,033 NZD

6 data points across 4 retailers

4 retailers$259 NZD to $1,033 NZD

B+
Cheapest Retailer
-
$259 NZD
$146 USD
B
Retailer 2
-
$300 NZD
$169 USD
View
B
Retailer 3
-
$322 NZD
$181 USD
View
Most Expensive
D
NZ Jewellers
35e7304b-03ba-4094-93b1-4f213f85f7b1 · Oct 31
$1,033 NZD
$581 USD
View
3 more retailers have this diamond
Prices start from $259 NZDSave up to $773 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.

B+
0.30ct Marquise
$259 NZD