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Marquise|Lab Grown|UNKNOWN

0.51ct H VS1 Marquise Lab Grown Diamond

ID • H/VS1 • UNKNOWN 613601360

Certificate UNKNOWN 613601360

Diamond specifications and retailer prices

From £249 GBP
As of November 4, 2026
Save £744 GBP (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £993 GBP at NZ Jewellers · As of November 4, 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 H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by UNKNOWN 613601360. Listed at 5 retailers as of November 4, 2026, with prices from £249 to £993, a £744 spread on the same certified stone. NZ Jewellers lists it at £993. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 613601360
Dimensions8.45 × 4.12 × 2.39 mm
L/W Ratio2.05
Top View
8.45 mm4.12 mm0.51 ctH / VS1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateUNKNOWN 613601360
Side View
Table 63.4%CrownGirdlePavilionCuletDepth 57.9%

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 4
Current: £993 GBP|Low: £239 GBP|High: £993 GBP|Avg: £447 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 8, 2026
Retailer 2£249 GBP
Retailer 5£289 GBP
Retailer 3£309 GBP
Retailer 4£499 GBP
NZ Jewellers£993 GBP

6 data points across 5 retailers

5 retailers£249 GBP to £993 GBP

A
Cheapest Retailer
-
£249 GBP
B+
Retailer 2
-
£289 GBP
View
B
Retailer 3
-
£309 GBP
View
B
Retailer 4
-
£499 GBP
View
Most Expensive
C
NZ Jewellers
5b592cad-9d4b-41a1-99fe-e72442cdd9e5 · Nov 4
£993 GBP
$1,340 USD
View
4 more retailers have this diamond
Prices start from £249 GBPSave up to £744 GBP

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
0.51ct Marquise
£249 GBP