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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 $450 AUD
$316 USD
As of October 30, 2026
Save $3,550 AUD (89%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,000 AUD 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 October 30, 2026, with prices from $450 to $4,000, a $3,550 spread on the same certified stone. Do Amore Diamonds lists it at $4,000. 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: Oct 30
Current: $4,000 AUD|Low: $363 AUD|High: $4,000 AUD|Avg: $1,436 AUD
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$450 AUD
Retailer 12$504 AUD
Retailer 11$522 AUD
Retailer 4$824 AUD
Retailer 10$907 AUD
Retailer 6$911 AUD
Retailer 13$934 AUD
Retailer 3$1,213 AUD
Retailer 7$1,636 AUD
Retailer 9$1,979 AUD
Retailer 5$2,065 AUD
Retailer 2$2,405 AUD
Do Amore Diamonds$4,000 AUD

13 data points across 13 retailers

10 retailers$450 AUD to $4,000 AUD

A
Cheapest Retailer
-
$450 AUD
$316 USD
A
Retailer 2
-
$504 AUD
$354 USD
View
Final sale: no returns
A
Retailer 3
-
$522 AUD
$367 USD
View
B+
Retailer 4
-
$907 AUD
$637 USD
View
B+
Retailer 5
-
$911 AUD
$640 USD
View
B+
Retailer 6
-
$934 AUD
$656 USD
View
B
Retailer 7
-
$1,636 AUD
$1,149 USD
View
B
Retailer 8
-
$1,979 AUD
$1,390 USD
View
B
Retailer 9
-
$2,405 AUD
£1,330 GBP
View
Most Expensive
B
Do Amore Diamonds
27-0ED26BBBB · Nov 2
$4,000 AUD
$2,810 USD
View
9 more retailers have this diamond
Prices start from $450 AUDSave up to $3,550 AUD

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
$450 AUD