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Heart|Lab Grown|IGI

1.56ct I SI1 Heart Lab Grown Diamond

ID • I/SI1 • IGI LG395946707

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG395946707

Diamond specifications and retailer prices

From £291 GBP
$390 USD
As of November 1, 2026
Save £622 GBP (68%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £913 GBP at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 1.56ct lab-grown heart diamond

This 1.56ct lab-grown heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG395946707 or 395946707. Listed at 3 retailers as of November 1, 2026, with prices from £291 to £913, a £622 spread on the same certified stone. The Diamond Guys lists it at £913. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.56
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG395946707
Dimensions7.09 × 8.17 × 4.81 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by chemical vapor deposition process (CVD) Type IIa
Top View
7.09 mm8.17 mm1.56 ctI / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG395946707
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £291 GBP|Low: £266 GBP|High: £2,841 GBP|Avg: £1,375 GBP|-64.3%
Retailer 1
Retailer 2
The Diamond Guys
September 13, 2026
Retailer 1£291 GBP
Retailer 2£690 GBP
The Diamond Guys£913 GBP

29 data points across 3 retailers

3 retailers£291 GBP to £913 GBP

B+
Cheapest Retailer
-
£291 GBP
$390 USD
B+
Retailer 2
-
£690 GBP
CA$1,284 CAD
View
Most Expensive
B+
The Diamond Guys
1779253543 · Nov 1
£913 GBP
$1,223 USD
View
2 more retailers have this diamond
Prices start from £291 GBPSave up to £622 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.

B+
1.56ct Heart
£291 GBP