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Heart|Lab Grown|IGI

1.66ct F VVS1 Heart Lab Grown Diamond

VG • F/VVS1 • IGI LGG1203217

Certificate IGI LGG1203217

Diamond specifications and retailer prices

From £211 GBP
$283 USD
As of October 30, 2026
Save £741 GBP (78%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £952 GBP at Taylor and Hart · As of October 29, 2026
View at Taylor and Hart

About this 1.66ct lab-grown heart diamond

This 1.66ct lab-grown heart sits in the one-and-a-half to two carat band, graded F colour (colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LGG1203217. Listed at 5 retailers as of October 29, 2026, with prices from £211 to £952, a £741 spread on the same certified stone. Taylor and Hart lists it at £952. 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
F
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LGG1203217
Dimensions7.40 × 8.06 × 4.75 mm
L/W Ratio1.09
Top View
7.40 mm8.06 mm1.66 ctF / VVS1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LGG1203217
Side View
Table 49.5%CrownGirdle: MED-STKPavilionCulet: NoneDepth 58.9%

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: £454 GBP|Low: £211 GBP|High: £1,002 GBP|Avg: £573 GBP|+3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Taylor and Hart
October 31, 2026
Retailer 3£211 GBP
Retailer 2£273 GBP
Retailer 4£354 GBP
Retailer 1£454 GBP
Taylor and Hart£952 GBP
Retailer 5£1,002 GBP

38 data points across 6 retailers

5 retailers£211 GBP to £952 GBP

A
Cheapest Retailer
-
£211 GBP
$283 USD
Final sale: no returns
A
Retailer 2
-
£273 GBP
View
A
Retailer 3
-
£354 GBP
$475 USD
View
B+
Retailer 4
-
£454 GBP
View
Most Expensive
B
Taylor and Hart
KXZBNVW · Oct 29
£952 GBP
$1,278 USD
View
4 more retailers have this diamond
Prices start from £211 GBPSave up to £741 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 Heart
£211 GBP