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Heart|Lab Grown|IGI

1.00ct D FL Heart Lab Grown Diamond

GD • D/FL • IGI LG818671731

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818671731

Diamond specifications and retailer prices

From $377 USD
As of November 1, 2026
Save $1,297 USD (77%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,674 USD at MOH London · As of November 1, 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 FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG818671731 or 818671731. Listed at 19 retailers as of November 1, 2026, with prices from $377 to $1,674, a $1,297 spread on the same certified stone. MOH London lists it at $1,674. 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

1.00
Carat
D
Color
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818671731
Dimensions6.26 × 6.82 × 3.97 mm
L/W Ratio1.09
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
6.26 mm6.82 mm1.00 ctD / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818671731
Side View
Table 56.0%Crown 35.9°Girdle: STK-THKPavilion 38.4°Culet: NoneDepth 58.2%

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: Nov 1
Current: $1,674 USD|Low: $377 USD|High: $1,996 USD|Avg: $988 USD|-15.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 2, 2026
Retailer 3$377 USD
Retailer 6$505 USD
Retailer 9$570 USD
Retailer 11$588 USD
Retailer 13$588 USD
Retailer 8$675 USD
Retailer 7$720 USD
Retailer 2$749 USD
Retailer 5$798 USD
Retailer 14$948 USD
Retailer 10$1,026 USD
Retailer 4$1,386 USD
Retailer 12$1,630 USD
MOH London$1,674 USD

37 data points across 14 retailers

19 retailers$377 USD to $1,674 USD

A
Cheapest Retailer
-
$377 USD
Final sale: no returns
Retailer 2
-
$406 USD
View
Price last confirmed 24 days ago
Retailer 3
-
$456 USD
View
Price last confirmed 34 days ago
Retailer 4
-
$498 USD
View
Price last confirmed 38 days ago
Retailer 5
-
$503 USD
View
Price last confirmed 20 days ago
Retailer 6
-
$503 USD
View
Price last confirmed 30 days ago
B+
Retailer 7
-
$570 USD
View
B+
Retailer 8
-
$588 USD
View
B+
Retailer 9
-
$588 USD
View
B+
Retailer 10
-
$675 USD
€643 EUR
View
B+
Retailer 11
-
$720 USD
ZAR 11,637 ZAR
View
B+
Retailer 12
-
$749 USD
£590 GBP
View
Retailer 13
-
$798 USD
HK$6,231 HKD
View
Price last confirmed 12 days ago
B
Retailer 14
-
$948 USD
View
B
Retailer 15
-
$1,026 USD
View
B
Retailer 16
-
$1,386 USD
View
Retailer 17
-
$1,617 USD
View
Price last confirmed 28 days ago
B
Retailer 18
-
$1,630 USD
View
Most Expensive
B
MOH London
LG818671731 · Nov 1
$1,674 USD
£1,318 GBP
View
18 more retailers have this diamond
Prices start from $377 USDSave up to $1,297 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
1.00ct Heart
$377 USD