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Heart|Lab Grown|IGI

0.91ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • IGI LG547249509

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG547249509

Diamond specifications and retailer prices

From £203 GBP
As of October 30, 2026
Save £517 GBP (72%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £719 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.91ct lab-grown heart diamond

This 0.91ct lab-grown heart sits in the just-under-one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG547249509 or 547249509. Listed at 11 retailers as of October 29, 2026, with prices from £203 to £719, a £517 spread on the same certified stone. MOH London lists it at £719. 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

0.91
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG547249509
Dimensions6.16 × 6.94 × 3.71 mm
L/W Ratio1.13
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
6.16 mm6.94 mm0.91 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG547249509
Side View
Table 59.0%Crown 37.3°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 53.5%

Caratlytics Score

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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: £719 GBP|Low: £153 GBP|High: £724 GBP|Avg: £339 GBP|-0.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 5£153 GBP
Retailer 3£203 GBP
Retailer 6£204 GBP
Retailer 2£271 GBP
Retailer 8£275 GBP
Retailer 9£326 GBP
Retailer 7£387 GBP
Retailer 4£520 GBP
MOH London£719 GBP

27 data points across 9 retailers

11 retailers£203 GBP to £719 GBP

Retailer 1
-
£119 GBP
$159 USD
Price last confirmed 26 days ago
Retailer 2
-
£143 GBP
$192 USD
View
Price last confirmed 33 days ago
Retailer 3
-
£153 GBP
$205 USD
View
Price last confirmed 26 days ago
A
Retailer 4
-
£203 GBP
View
B+
Retailer 5
-
£204 GBP
$274 USD
View
B+
Retailer 6
-
£271 GBP
View
B+
Retailer 7
-
£275 GBP
$368 USD
View
B
Retailer 8
-
£387 GBP
$518 USD
View
Retailer 9
-
£492 GBP
$659 USD
View
Price last confirmed 27 days ago
B
Retailer 10
-
£520 GBP
$697 USD
View
Most Expensive
B
MOH London
LG547249509 · Oct 29
£719 GBP
View
10 more retailers have this diamond
Prices start from £203 GBPSave up to £517 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
0.91ct Heart
£203 GBP