CaratHunter
Plans
Round|Lab Grown|IGI

1.66ct K SI1 Round Lab Grown Diamond

EX • K/SI1 • IGI LG407948757

Shape and cutting style on the report: Round brilliant

Certificate IGI LG407948757

Diamond specifications and retailer prices

From $1,860 NZD
As of November 5, 2026
Save $5,453 NZD (75%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $7,313 NZD at MOH London · As of November 3, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG407948757 or 407948757. Listed at 9 retailers as of November 3, 2026, with prices from $1,860 to $7,313, a $5,453 spread on the same certified stone. MOH London lists it at $7,313. 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

1.66
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG407948757
Dimensions7.67 × 7.72 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.67 mm7.72 mm1.66 ctK / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG407948757
Side View
Table 59.0%Crown 32.1°GirdlePavilion 40.3°Culet: NoneDepth 59.2%

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 5
Current: $7,313 NZD|Low: $1,860 NZD|High: $7,411 NZD|Avg: $4,093 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 3, 2026
Retailer 3$1,860 NZD
Retailer 4$2,156 NZD
Retailer 2$2,471 NZD
Retailer 7$3,135 NZD
Retailer 5$3,438 NZD
Retailer 6$4,506 NZD
Retailer 8$6,171 NZD
MOH London$7,313 NZD

15 data points across 8 retailers

9 retailers$1,860 NZD to $7,313 NZD

A
Cheapest Retailer
-
$1,860 NZD
B+
Retailer 2
-
$2,022 NZD
View
Retailer 3
-
$2,156 NZD
View
Price last confirmed 25 days ago
B+
Retailer 4
-
$2,156 NZD
View
B+
Retailer 5
-
$2,471 NZD
View
B
Retailer 6
-
$3,438 NZD
View
B
Retailer 7
-
$4,043 NZD
View
B
Retailer 8
-
$4,506 NZD
View
Most Expensive
B
MOH London
LG407948757 · Nov 3
$7,313 NZD
£3,192 GBP
View
8 more retailers have this diamond
Prices start from $1,860 NZDSave up to $5,453 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
$1,860 NZD