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Radiant|Lab Grown|IGI

1.66ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG468109140

Shape and cutting style on the report: Round cornered rectangular modified brilliant

Certificate IGI LG468109140

Diamond specifications and retailer prices

From $562 NZD
$316 USD
As of November 2, 2026
Save $4,433 NZD (89%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,994 NZD at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.66ct lab-grown radiant diamond

This 1.66ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG468109140 or 468109140. Listed at 10 retailers as of November 2, 2026, with prices from $562 to $4,994, a $4,433 spread on the same certified stone. Do Amore Diamonds lists it at $4,994. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.66
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG468109140
Dimensions8.22 × 5.67 × 3.94 mm
L/W Ratio1.45
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.22 mm5.67 mm1.66 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG468109140
Side View
Table 63.5%Crown 38.4°Girdle: MED-STKPavilionCulet: NoneDepth 69.5%

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: $4,994 NZD|Low: $453 NZD|High: $4,994 NZD|Avg: $1,793 NZD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 8$562 NZD
Retailer 12$629 NZD
Retailer 11$652 NZD
Retailer 4$1,029 NZD
Retailer 10$1,132 NZD
Retailer 6$1,137 NZD
Retailer 13$1,166 NZD
Retailer 3$1,514 NZD
Retailer 7$2,042 NZD
Retailer 9$2,470 NZD
Retailer 5$2,578 NZD
Retailer 2$3,002 NZD
Do Amore Diamonds$4,994 NZD

13 data points across 13 retailers

10 retailers$562 NZD to $4,994 NZD

A
Cheapest Retailer
-
$562 NZD
$316 USD
A
Retailer 2
-
$629 NZD
$354 USD
View
Final sale: no returns
A
Retailer 3
-
$652 NZD
$367 USD
View
B+
Retailer 4
-
$1,132 NZD
$637 USD
View
B+
Retailer 5
-
$1,137 NZD
$640 USD
View
B+
Retailer 6
-
$1,166 NZD
$656 USD
View
B
Retailer 7
-
$2,042 NZD
$1,149 USD
View
B
Retailer 8
-
$2,470 NZD
$1,390 USD
View
B
Retailer 9
-
$3,002 NZD
£1,330 GBP
View
Most Expensive
B
Do Amore Diamonds
27-0ED26BBBB · Nov 2
$4,994 NZD
$2,810 USD
View
9 more retailers have this diamond
Prices start from $562 NZDSave up to $4,433 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 Radiant
$562 NZD