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Emerald|Lab Grown|IGI

0.66ct D SI1 Emerald Lab Grown Diamond

ID • D/SI1 • IGI LG805671998

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG805671998

Diamond specifications and retailer prices

From £124 GBP
HK$1,300 HKD
As of November 1, 2026
Save £189 GBP (60%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £313 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 0.66ct lab-grown emerald diamond

This 0.66ct lab-grown emerald sits in the half to three-quarter carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG805671998 or 805671998. Listed at 6 retailers as of October 31, 2026, with prices from £124 to £313, a £189 spread on the same certified stone. Brilliant Earth lists it at £313. 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

0.66
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle39.8°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805671998
Dimensions4.75 × 4.74 × 3.21 mm
L/W Ratio1.00
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
4.75 mm4.74 mm0.66 ctD / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805671998
Side View
Table 71.0%Crown 39.8°Girdle: MediumPavilion 39.5°Culet: NoneDepth 67.7%

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: £313 GBP|Low: £124 GBP|High: £381 GBP|Avg: £227 GBP|-17.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 6£124 GBP
Retailer 4£143 GBP
Retailer 3£188 GBP
Retailer 2£249 GBP
Retailer 5£297 GBP
Brilliant Earth£313 GBP

15 data points across 6 retailers

6 retailers£124 GBP to £313 GBP

A
Cheapest Retailer
-
£124 GBP
HK$1,300 HKD
Retailer 2
-
£143 GBP
$192 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
£188 GBP
€240 EUR
View
B+
Retailer 4
-
£249 GBP
$334 USD
View
B
Retailer 5
-
£297 GBP
SGD 537 SGD
View
Most Expensive
B+
Brilliant Earth
20782842A · Oct 31
£313 GBP
$420 USD
View
5 more retailers have this diamond
Prices start from £124 GBPSave up to £189 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
0.66ct Emerald
£124 GBP