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Marquise|Lab Grown

0.31ct F SI1 Marquise Lab Grown Diamond

GD • F/SI1 • TA50D-459-459

Diamond specifications and retailer prices

From $283 NZD
$159 USD
As of November 2, 2026
Save $844 NZD (75%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,127 NZD at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

About this 0.31ct lab-grown marquise diamond

This 0.31ct lab-grown marquise sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade. Listed at 4 retailers as of October 31, 2026, with prices from $283 to $1,127, a $844 spread on the same certified stone. NZ Jewellers lists it at $1,127. 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

0.31
Carat
F
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading Lab
CertificateTA50D-459-459
Dimensions7.53 × 3.50 × 1.97 mm
L/W Ratio2.15
Top View
7.53 mm3.50 mm0.31 ctF / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateTA50D-459-459
Side View
Table 63.1%CrownGirdlePavilionCuletDepth 56.4%

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: Nov 2
Current: $1,127 NZD|Low: $272 NZD|High: $1,127 NZD|Avg: $492 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
October 8, 2026
Retailer 2$283 NZD
Retailer 4$329 NZD
Retailer 3$350 NZD
NZ Jewellers$1,127 NZD

6 data points across 4 retailers

4 retailers$283 NZD to $1,127 NZD

B+
Cheapest Retailer
-
$283 NZD
$159 USD
B
Retailer 2
-
$329 NZD
$185 USD
View
B
Retailer 3
-
$350 NZD
$197 USD
View
Most Expensive
D
NZ Jewellers
074d2c23-10ca-4e15-bbd0-d2f478038c88 · Oct 31
$1,127 NZD
$634 USD
View
3 more retailers have this diamond
Prices start from $283 NZDSave up to $844 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+
0.31ct Marquise
$283 NZD