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Heart|Lab Grown|IGI

0.91ct D IF Heart Lab Grown Diamond

EX • D/IF • IGI LG670431145

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG670431145

Diamond specifications and retailer prices

From $346 USD
As of November 4, 2026
Save $1,324 USD (79%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $1,670 USD at MOH London · As of November 5, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG670431145 or 670431145. Listed at 20 retailers as of November 4, 2026, with prices from $346 to $1,670, a $1,324 spread on the same certified stone. MOH London lists it at $1,670. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.91
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670431145
Dimensions5.82 × 6.86 × 4.12 mm
L/W Ratio1.18
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
5.82 mm6.86 mm0.91 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670431145
Side View
Table 61.0%Crown 37.8°Girdle: STK-THKPavilion 40.4°Culet: NoneDepth 60.1%

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: Nov 4
Current: $1,670 USD|Low: $329 USD|High: $1,722 USD|Avg: $911 USD|-2.9%
MOH London
Retailer 2
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Retailer 19
November 5, 2026
Retailer 19$346 USD
Retailer 15$386 USD
Retailer 10$401 USD
Retailer 6$428 USD
Retailer 9$428 USD
Retailer 18$625 USD
Retailer 4$660 USD
Retailer 7$688 USD
Retailer 2$762 USD
Retailer 14$777 USD
Retailer 17$830 USD
Retailer 12$1,069 USD
Retailer 13$1,131 USD
Retailer 16$1,258 USD
Retailer 3$1,377 USD
Retailer 11$1,419 USD
Retailer 5$1,610 USD
Retailer 8$1,658 USD
MOH London$1,670 USD

40 data points across 19 retailers

20 retailers$346 USD to $1,670 USD

A
Cheapest Retailer
-
$346 USD
A
Retailer 2
-
$386 USD
View
Final sale: no returns
A
Retailer 3
-
$401 USD
View
Retailer 4
-
$428 USD
View
Price last confirmed 11 days ago
A
Retailer 5
-
$428 USD
View
A
Retailer 6
-
$625 USD
View
B+
Retailer 7
-
$660 USD
View
B+
Retailer 8
-
$688 USD
View
B+
Retailer 9
-
$762 USD
View
B+
Retailer 10
-
$777 USD
View
B+
Retailer 11
-
$830 USD
View
B+
Retailer 12
-
$1,069 USD
View
B
Retailer 13
-
$1,131 USD
View
B
Retailer 14
-
$1,258 USD
View
B
Retailer 15
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$1,377 USD
View
B
Retailer 16
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$1,419 USD
View
Retailer 17
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$1,610 USD
View
Price last confirmed 20 days ago
B
Retailer 18
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$1,629 USD
View
B
Retailer 19
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$1,658 USD
View
Most Expensive
B
MOH London
LG670431145 · Nov 5
$1,670 USD
£1,315 GBP
View
19 more retailers have this diamond
Prices start from $346 USDSave up to $1,324 USD

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
$346 USD