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Round|Lab Grown|IGI

1.66ct J SI1 Round Lab Grown Diamond

ID • J/SI1 • IGI LG485136745

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485136745

Diamond specifications and retailer prices

From $1,671 NZD
$940 USD
As of November 2, 2026
Save $6,866 NZD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $8,537 NZD at MOH London · As of October 29, 2026
View at MOH London

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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485136745 or 485136745. Listed at 11 retailers as of October 29, 2026, with prices from $1,671 to $8,537, a $6,866 spread on the same certified stone. MOH London lists it at $8,537. 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
J
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485136745
Dimensions7.63 × 7.62 × 4.67 mm
L/W Ratio1.00
Girdle conditionFaceted
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
7.63 mm7.62 mm1.66 ctJ / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485136745
Side View
Table 56.0%Crown 35.7°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 61.3%

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 2
Current: $8,537 NZD|Low: $1,671 NZD|High: $8,604 NZD|Avg: $3,800 NZD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 2$1,671 NZD
Retailer 3$2,278 NZD
Retailer 6$2,550 NZD
Retailer 4$2,643 NZD
Retailer 7$2,950 NZD
Retailer 10$3,260 NZD
Retailer 9$3,661 NZD
Retailer 5$4,186 NZD
Retailer 8$4,927 NZD
MOH London$8,537 NZD

15 data points across 10 retailers

11 retailers$1,671 NZD to $8,537 NZD

A
Cheapest Retailer
-
$1,671 NZD
$940 USD
B+
Retailer 2
-
$2,278 NZD
$1,282 USD
View
B+
Retailer 3
-
$2,479 NZD
$1,395 USD
View
B+
Retailer 4
-
$2,550 NZD
$1,435 USD
View
Final sale: no returns
Retailer 5
-
$2,643 NZD
$1,487 USD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$2,643 NZD
$1,487 USD
View
B+
Retailer 7
-
$2,950 NZD
$1,660 USD
View
B
Retailer 8
-
$4,186 NZD
$2,355 USD
View
B
Retailer 9
-
$4,927 NZD
$2,772 USD
View
B
Retailer 10
-
$4,953 NZD
$2,787 USD
View
Most Expensive
B
MOH London
LG485136745 · Oct 29
$8,537 NZD
£3,782 GBP
View
10 more retailers have this diamond
Prices start from $1,671 NZDSave up to $6,866 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
$1,671 NZD