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Heart|Lab Grown|IGI

1.71ct D FL Heart Lab Grown Diamond

VG • D/FL • IGI LG830620123

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG830620123

Diamond specifications and retailer prices

From £750 GBP
As of October 30, 2026
Save £2,281 GBP (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £3,030 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.71ct lab-grown heart diamond

This 1.71ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG830620123 or 830620123. Listed at 8 retailers as of October 30, 2026, with prices from £750 to £3,030, a £2,281 spread on the same certified stone. Brilliant Earth lists it at £3,030. 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

1.71
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830620123
Dimensions7.42 × 8.32 × 4.78 mm
L/W Ratio1.12
Girdle conditionFaceted
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
7.42 mm8.32 mm1.71 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830620123
Side View
Table 56.0%Crown 37.3°Girdle: STK-THKPavilion 38.3°Culet: NoneDepth 57.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £3,030 GBP|Low: £750 GBP|High: £4,090 GBP|Avg: £1,792 GBP|-25.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 5£750 GBP
Retailer 2£1,013 GBP
Retailer 8£1,059 GBP
Retailer 4£1,069 GBP
Retailer 3£1,572 GBP
Retailer 7£2,282 GBP
Retailer 6£2,695 GBP
Brilliant Earth£3,030 GBP

3 data points across 8 retailers

8 retailers£750 GBP to £3,030 GBP

A
Cheapest Retailer
-
£750 GBP
B+
Retailer 2
-
£1,013 GBP
View
B+
Retailer 3
-
£1,059 GBP
$1,419 USD
View
B+
Retailer 4
-
£1,069 GBP
$1,433 USD
View
B
Retailer 5
-
£1,572 GBP
$2,106 USD
View
B
Retailer 6
-
£2,282 GBP
$3,058 USD
View
B
Retailer 7
-
£2,695 GBP
$3,611 USD
View
Most Expensive
B
Brilliant Earth
22348642A · Oct 31
£3,030 GBP
$4,060 USD
View
7 more retailers have this diamond
Prices start from £750 GBPSave up to £2,281 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
1.71ct Heart
£750 GBP