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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 $227 AUD
$159 USD
As of November 2, 2026
Save $678 AUD (75%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $905 AUD 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 $227 to $905, a $678 spread on the same certified stone. NZ Jewellers lists it at $905. 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: $905 AUD|Low: $218 AUD|High: $905 AUD|Avg: $395 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
October 8, 2026
Retailer 2$227 AUD
Retailer 4$264 AUD
Retailer 3$281 AUD
NZ Jewellers$905 AUD

6 data points across 4 retailers

4 retailers$227 AUD to $905 AUD

B+
Cheapest Retailer
-
$227 AUD
$159 USD
B
Retailer 2
-
$264 AUD
$185 USD
View
B
Retailer 3
-
$281 AUD
$197 USD
View
Most Expensive
D
NZ Jewellers
074d2c23-10ca-4e15-bbd0-d2f478038c88 · Oct 31
$905 AUD
$634 USD
View
3 more retailers have this diamond
Prices start from $227 AUDSave up to $678 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.

B+
0.31ct Marquise
$227 AUD