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Round|Lab Grown|IGI

1.66ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG12361906

Shape and cutting style on the report: Round brilliant

Certificate IGI LG12361906

Diamond specifications and retailer prices

From HK$3,452 HKD
$440 USD
As of November 1, 2026
Save HK$9,611 HKD (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$21,734 HKD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.66ct lab-grown round diamond

This 1.66ct lab-grown round sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12361906 or 12361906. Listed at 14 retailers as of November 1, 2026, with a 278% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.66
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12361906
Dimensions7.59 × 7.56 × 4.73 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment. Type IIa
Top View
7.59 mm7.56 mm1.66 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12361906
Side View
Table 59.0%Crown 35.5°Girdle: THN-UNDPavilion 41.4°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: HK$21,734 HKD|Low: HK$2,142 HKD|High: HK$21,734 HKD|Avg: HK$7,903 HKD|+18.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 3, 2026
Retailer 10HK$2,142 HKD
Retailer 11HK$2,370 HKD
Retailer 6HK$3,452 HKD
Retailer 7HK$4,927 HKD
Retailer 2HK$5,989 HKD
Retailer 9HK$6,848 HKD
Retailer 5HK$8,882 HKD
Retailer 3HK$10,937 HKD
Retailer 8HK$12,001 HKD
Retailer 4HK$13,064 HKD
Do Amore DiamondsHK$21,734 HKD

30 data points across 11 retailers

14 retailersHK$3,452 HKD to HK$13,064 HKD

Retailer 1
-
HK$1,907 HKD
$243 USD
Price last confirmed 41 days ago
Retailer 2
-
HK$2,213 HKD
$282 USD
View
Price last confirmed 41 days ago
Retailer 3
-
HK$2,338 HKD
$298 USD
View
Price last confirmed 42 days ago
A
Retailer 4
-
HK$3,452 HKD
$440 USD
View
B+
Retailer 5
-
HK$4,237 HKD
$540 USD
View
B+
Retailer 6
-
HK$4,927 HKD
$628 USD
View
B
Retailer 7
-
HK$5,989 HKD
£601 GBP
View
B
Retailer 8
-
HK$6,848 HKD
$873 USD
View
Retailer 9
-
HK$8,403 HKD
$1,071 USD
View
Price last confirmed 42 days ago
B
Retailer 10
-
HK$8,882 HKD
$1,132 USD
View
B
Retailer 11
-
HK$10,937 HKD
$1,394 USD
View
B
Retailer 12
-
HK$12,001 HKD
$1,529 USD
View
C
Retailer 13
-
HK$13,064 HKD
£1,311 GBP
View
Most Expensive
Do Amore Diamonds
27-08AD635EE · Nov 2
HK$21,734 HKD
$2,770 USD
View
Price under review
13 more retailers have this diamond
Prices start from HK$3,452 HKDSave up to HK$9,611 HKD

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
1.66ct Round
HK$3,452 HKD