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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 $782 NZD
$440 USD
As of November 1, 2026
Save $2,177 NZD (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $4,923 NZD 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: $4,923 NZD|Low: $485 NZD|High: $4,923 NZD|Avg: $1,786 NZD|+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 2, 2026
Retailer 10$485 NZD
Retailer 11$537 NZD
Retailer 6$782 NZD
Retailer 7$1,116 NZD
Retailer 2$1,357 NZD
Retailer 9$1,551 NZD
Retailer 5$2,012 NZD
Retailer 3$2,478 NZD
Retailer 8$2,718 NZD
Retailer 4$2,959 NZD
Do Amore Diamonds$4,923 NZD

29 data points across 11 retailers

14 retailers$782 NZD to $2,959 NZD

Retailer 1
-
$432 NZD
$243 USD
Price last confirmed 41 days ago
Retailer 2
-
$501 NZD
$282 USD
View
Price last confirmed 41 days ago
Retailer 3
-
$530 NZD
$298 USD
View
Price last confirmed 41 days ago
A
Retailer 4
-
$782 NZD
$440 USD
View
B+
Retailer 5
-
$960 NZD
$540 USD
View
B+
Retailer 6
-
$1,116 NZD
$628 USD
View
B
Retailer 7
-
$1,357 NZD
£601 GBP
View
B
Retailer 8
-
$1,551 NZD
$873 USD
View
Retailer 9
-
$1,903 NZD
$1,071 USD
View
Price last confirmed 42 days ago
B
Retailer 10
-
$2,012 NZD
$1,132 USD
View
B
Retailer 11
-
$2,478 NZD
$1,394 USD
View
B
Retailer 12
-
$2,718 NZD
$1,529 USD
View
C
Retailer 13
-
$2,959 NZD
£1,311 GBP
View
Most Expensive
Do Amore Diamonds
27-08AD635EE · Nov 2
$4,923 NZD
$2,770 USD
View
Price under review
13 more retailers have this diamond
Prices start from $782 NZDSave up to $2,177 NZD

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
$782 NZD