Emerald|Lab Grown|UNKNOWN

0.51ct H SI1 Emerald Lab Grown Diamond

ID • H/SI1 • UNKNOWN 64342453

Certificate UNKNOWN 64342453

Diamond specifications and retailer prices

From €149 EUR
$167 USD
As of October 29, 2026
Save €445 EUR (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: €594 EUR 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by UNKNOWN 64342453. Listed at 5 retailers as of October 29, 2026, with prices from €149 to €594, a €445 spread on the same certified stone. NZ Jewellers lists it at €594. 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
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabUNKNOWN
CertificateUNKNOWN 64342453
Dimensions5.67 × 3.72 × 2.39 mm
L/W Ratio1.52
Top View
5.67 mm3.72 mm0.51 ctH / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateUNKNOWN 64342453
Side View
Table 64.7%CrownGirdlePavilionCuletDepth 64.2%

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: Oct 29
Current: €594 EUR|Low: €143 EUR|High: €594 EUR|Avg: €267 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 11, 2026
Retailer 2€149 EUR
Retailer 5€173 EUR
Retailer 3€185 EUR
Retailer 4€332 EUR
NZ Jewellers€594 EUR

8 data points across 5 retailers

5 retailers€149 EUR to €594 EUR

A
Cheapest Retailer
-
€149 EUR
$167 USD
B+
Retailer 2
-
€173 EUR
$193 USD
View
B+
Retailer 3
-
€185 EUR
$207 USD
View
B
Retailer 4
-
€332 EUR
$371 USD
View
Most Expensive
C
NZ Jewellers
8f3b0757-3c1e-4fcd-8619-9208084ba563 · Oct 31
€594 EUR
$664 USD
View
4 more retailers have this diamond
Prices start from €149 EURSave up to €445 EUR

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
€149 EUR