Marquise|Lab Grown|IGI

1.80ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG823670043

Certificate IGI LG823670043

Diamond specifications and retailer prices

From $1,660 USD
As of October 30, 2026
Save $3,020 USD (65%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,680 USD at Kay Jewelers · As of November 1, 2026
View at Kay Jewelers

About this 1.8ct lab-grown marquise diamond

This 1.8ct lab-grown marquise sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG823670043 or 823670043. Listed at 4 retailers as of October 30, 2026, with prices from $1,660 to $4,680, a $3,020 spread on the same certified stone. Kay Jewelers lists it at $4,680. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.80
Carat
D
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG823670043
Dimensions12.27 × 6.40 × 4.03 mm
L/W Ratio1.92
Top View
12.27 mm6.40 mm1.80 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823670043
Side View
Table 59.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 63.0%

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: Oct 30
Current: $4,680 USD|Low: $1,660 USD|High: $4,680 USD|Avg: $3,993 USD
Kay Jewelers
Retailer 2
Retailer 3
Retailer 4
September 28, 2026
Retailer 2$1,660 USD
Retailer 4$3,442 USD
Kay Jewelers$4,680 USD
Retailer 3$4,680 USD

3 data points across 4 retailers

4 retailers$1,660 USD to $4,680 USD

A
Cheapest Retailer
-
$1,660 USD
B
Retailer 2
-
$3,442 USD
View
B
Retailer 3
-
$4,680 USD
View
Most Expensive
B
Kay Jewelers
259776984 · Nov 1
$4,680 USD
View
3 more retailers have this diamond
Prices start from $1,660 USDSave up to $3,020 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
1.80ct Marquise
$1,660 USD