CaratHunter
Plans
Heart|Lab Grown|IGI

1.66ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG825660136

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG825660136

Diamond specifications and retailer prices

From $705 USD
As of November 2, 2026
Save $3,969 USD (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $4,674 USD at With Clarity · As of November 2, 2026
View at With Clarity

About this 1.66ct lab-grown heart diamond

This 1.66ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825660136 or 825660136. Listed at 19 retailers as of November 2, 2026, with prices from $705 to $4,674, a $3,969 spread on the same certified stone. With Clarity lists it at $4,674. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825660136
Dimensions8.05 × 7.24 × 4.93 mm
L/W Ratio1.11
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
8.05 mm7.24 mm1.66 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825660136
Side View
Table 64.0%Crown 35°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,883 USD|Low: $705 USD|High: $5,310 USD|Avg: $2,063 USD|-8.5%
Retailer 1
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
With Clarity
November 2, 2026
Retailer 11$705 USD
Retailer 6$777 USD
Retailer 3$829 USD
Retailer 8$861 USD
Retailer 9$917 USD
Retailer 17$1,005 USD
Retailer 7$1,074 USD
Retailer 12$1,329 USD
Retailer 5$1,337 USD
Retailer 18$1,346 USD
Retailer 16$1,524 USD
Retailer 1$1,883 USD
Retailer 4$2,330 USD
Retailer 15$2,737 USD
Retailer 2$2,857 USD
Retailer 14$3,272 USD
Retailer 10$3,286 USD
Retailer 13$3,990 USD
With Clarity$4,674 USD

37 data points across 19 retailers

19 retailers$705 USD to $4,674 USD

A
Cheapest Retailer
-
$705 USD
A
Retailer 2
-
$777 USD
View
A
Retailer 3
-
$829 USD
View
Retailer 4
-
$861 USD
View
Price last confirmed 16 days ago
A
Retailer 5
-
$917 USD
View
Final sale: no returns
A
Retailer 6
-
$1,005 USD
View
A
Retailer 7
-
$1,074 USD
View
B+
Retailer 8
-
$1,329 USD
£1,047 GBP
View
B+
Retailer 9
-
$1,337 USD
View
B+
Retailer 10
-
$1,346 USD
View
B+
Retailer 11
-
$1,524 USD
ZAR 24,613 ZAR
View
B+
Retailer 12
-
$1,883 USD
View
B+
Retailer 13
-
$2,330 USD
View
B+
Retailer 14
-
$2,737 USD
View
B
Retailer 15
-
$2,857 USD
View
B
Retailer 16
-
$3,272 USD
£2,576 GBP
View
B
Retailer 17
-
$3,286 USD
SGD 4,440 SGD
View
B
Retailer 18
-
$3,990 USD
View
Most Expensive
B
With Clarity
825660136 · Nov 2
$4,674 USD
View
18 more retailers have this diamond
Prices start from $705 USDSave up to $3,969 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
1.66ct Heart
$705 USD