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Marquise|Lab Grown

0.51ct G SI1 Marquise Lab Grown Diamond

EX • G/SI1 • FA4-181-1244

Diamond specifications and retailer prices

From $174 USD
As of November 2, 2026
Save $521 USD (75%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $695 USD at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

About this 0.51ct lab-grown marquise diamond

This 0.51ct lab-grown marquise sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade. Listed at 4 retailers as of October 31, 2026, with prices from $174 to $695, a $521 spread on the same certified stone. NZ Jewellers lists it at $695. 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

0.51
Carat
G
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading Lab
CertificateFA4-181-1244
Dimensions8.45 × 4.06 × 2.59 mm
L/W Ratio2.08
Top View
8.45 mm4.06 mm0.51 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateFA4-181-1244
Side View
Table 61.4%CrownGirdlePavilionCuletDepth 63.8%

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: $695 USD|Low: $167 USD|High: $695 USD|Avg: $303 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
October 8, 2026
Retailer 2$174 USD
Retailer 4$202 USD
Retailer 3$216 USD
NZ Jewellers$695 USD

6 data points across 4 retailers

4 retailers$174 USD to $695 USD

B+
Cheapest Retailer
-
$174 USD
B+
Retailer 2
-
$202 USD
View
B+
Retailer 3
-
$216 USD
View
Most Expensive
C
NZ Jewellers
a804e4ed-3906-4ec4-a2e8-87a2b9417107 · Oct 31
$695 USD
View
3 more retailers have this diamond
Prices start from $174 USDSave up to $521 USD

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+
0.51ct Marquise
$174 USD