CaratHunter
Plans
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 £236 GBP
$316 USD
As of October 30, 2026
Save £1,861 GBP (89%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,097 GBP 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 £236 to £2,097, a £1,861 spread on the same certified stone. Do Amore Diamonds lists it at £2,097. 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: £2,097 GBP|Low: £190 GBP|High: £2,097 GBP|Avg: £753 GBP
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£236 GBP
Retailer 12£264 GBP
Retailer 11£274 GBP
Retailer 4£432 GBP
Retailer 10£475 GBP
Retailer 6£478 GBP
Retailer 13£490 GBP
Retailer 3£636 GBP
Retailer 7£858 GBP
Retailer 9£1,037 GBP
Retailer 5£1,082 GBP
Retailer 2£1,261 GBP
Do Amore Diamonds£2,097 GBP

13 data points across 13 retailers

10 retailers£236 GBP to £2,097 GBP

A
Cheapest Retailer
-
£236 GBP
$316 USD
A
Retailer 2
-
£264 GBP
$354 USD
View
Final sale: no returns
A
Retailer 3
-
£274 GBP
$367 USD
View
B+
Retailer 4
-
£475 GBP
$637 USD
View
B+
Retailer 5
-
£478 GBP
$640 USD
View
B+
Retailer 6
-
£490 GBP
$656 USD
View
B
Retailer 7
-
£858 GBP
$1,149 USD
View
B
Retailer 8
-
£1,037 GBP
$1,390 USD
View
B
Retailer 9
-
£1,261 GBP
View
Most Expensive
B
Do Amore Diamonds
27-0ED26BBBB · Nov 2
£2,097 GBP
$2,810 USD
View
9 more retailers have this diamond
Prices start from £236 GBPSave up to £1,861 GBP

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
£236 GBP