Marquise|Lab Grown|IGI

3.50ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG754508870

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG754508870

Diamond specifications and retailer prices

From $15,575 USD
As of October 28, 2026
1 retailer carries this diamond
Only listing: $15,575 USD at Shane Co
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Shane Co

About this 3.5ct lab-grown marquise diamond

This 3.5ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG754508870 or 754508870. Listed at a single retailer as of October 28, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.50
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG754508870
Dimensions15.34 × 7.84 mm
L/W Ratio1.96
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
15.34 mm7.84 mm3.50 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG754508870
Side View
Table 61.0%Crown 36.3°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 63.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 28
Current: $6,998 USD|Low: $6,998 USD|High: $49,818 USD|Avg: $20,614 USD|-37.7%
Retailer 1
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Retailer 4
Retailer 5
Retailer 6
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Retailer 9
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Retailer 13
Shane Co
October 5, 2026
Retailer 1$6,998 USD
Retailer 9$7,849 USD
Retailer 11$8,782 USD
Retailer 10$9,690 USD
Retailer 7$12,448 USD
Retailer 2$13,880 USD
Retailer 4$14,207 USD
Retailer 8$15,502 USD
Shane Co$15,575 USD
Retailer 6$15,890 USD
Retailer 13$23,488 USD
Retailer 12$26,160 USD
Retailer 3$27,690 USD
Retailer 5$49,336 USD

52 data points across 14 retailers

1 retailer

B
Shane Co
26I12H3 · Oct 28
$15,575 USD
View

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.

B
3.50ct Marquise
$15,575 USD