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Emerald|Lab Grown|UNKNOWN

0.51ct F SI1 Emerald Lab Grown Diamond

ID • F/SI1 • UNKNOWN 45262693

Certificate UNKNOWN 45262693

Diamond specifications and retailer prices

From £136 GBP
$182 USD
As of November 1, 2026
Save £405 GBP (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £541 GBP at NZ Jewellers · As of October 31, 2026
View at NZ Jewellers

About this 0.51ct lab-grown emerald diamond

This 0.51ct lab-grown emerald sits in the half to three-quarter carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by UNKNOWN 45262693. Listed at 5 retailers as of October 31, 2026, with prices from £136 to £541, a £405 spread on the same certified stone. NZ Jewellers lists it at £541. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 45262693
Dimensions5.44 × 3.80 × 2.51 mm
L/W Ratio1.43
Top View
5.44 mm3.80 mm0.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateUNKNOWN 45262693
Side View
Table 62.9%CrownGirdlePavilionCuletDepth 66.2%

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 1
Current: £541 GBP|Low: £130 GBP|High: £541 GBP|Avg: £242 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 11, 2026
Retailer 2£136 GBP
Retailer 5£157 GBP
Retailer 3£168 GBP
Retailer 4£297 GBP
NZ Jewellers£541 GBP

8 data points across 5 retailers

5 retailers£136 GBP to £541 GBP

A
Cheapest Retailer
-
£136 GBP
$182 USD
B+
Retailer 2
-
£157 GBP
$211 USD
View
B+
Retailer 3
-
£168 GBP
$226 USD
View
B
Retailer 4
-
£297 GBP
$399 USD
View
Most Expensive
C
NZ Jewellers
2ee9a139-441c-49e1-ac97-6b6d5e866d4b · Oct 31
£541 GBP
$726 USD
View
4 more retailers have this diamond
Prices start from £136 GBPSave up to £405 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 Emerald
£136 GBP