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Heart|Lab Grown|IGI

1.00ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • IGI LG517287920

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG517287920

Diamond specifications and retailer prices

From €149 EUR
$167 USD
As of October 30, 2026
Save €624 EUR (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €773 EUR at MOH London · As of October 26, 2026
View at MOH London

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG517287920 or 517287920. Listed at 13 retailers as of October 26, 2026, with prices from €149 to €773, a €624 spread on the same certified stone. MOH London lists it at €773. 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

1.00
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG517287920
Dimensions6.20 × 6.81 × 3.95 mm
L/W Ratio1.10
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
6.20 mm6.81 mm1.00 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG517287920
Side View
Table 59.5%Crown 34°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 58.0%

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: €773 EUR|Low: €133 EUR|High: €781 EUR|Avg: €385 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 5€133 EUR
Retailer 6€149 EUR
Retailer 3€224 EUR
Retailer 8€283 EUR
Retailer 2€286 EUR
Retailer 7€383 EUR
Retailer 4€561 EUR
Retailer 9€581 EUR
MOH London€773 EUR

40 data points across 9 retailers

13 retailers€149 EUR to €773 EUR

Retailer 1
-
€133 EUR
$149 USD
Price last confirmed 8 days ago
A
Retailer 2
-
€149 EUR
$167 USD
View
Final sale: no returns
Retailer 3
-
€155 EUR
$173 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
€166 EUR
$185 USD
View
A
Retailer 5
-
€166 EUR
$185 USD
View
B+
Retailer 6
-
€224 EUR
$250 USD
View
B+
Retailer 7
-
€283 EUR
$316 USD
View
B+
Retailer 8
-
€286 EUR
£252 GBP
View
B+
Retailer 9
-
€383 EUR
$428 USD
View
B
Retailer 10
-
€531 EUR
$593 USD
View
B
Retailer 11
-
€561 EUR
$627 USD
View
B
Retailer 12
-
€581 EUR
$649 USD
View
Most Expensive
B
MOH London
LG517287920 · Oct 26
€773 EUR
£680 GBP
View
12 more retailers have this diamond
Prices start from €149 EURSave up to €624 EUR

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
1.00ct Heart
€149 EUR