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Marquise|Lab Grown|IGI

1.67ct D IF Marquise Lab Grown Diamond

ID • D/IF • IGI LG677520630

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG677520630

Diamond specifications and retailer prices

From £1,189 GBP
$1,593 USD
As of October 31, 2026
Save £1,214 GBP (51%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,403 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.67ct lab-grown marquise diamond

This 1.67ct 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 LG677520630 or 677520630. Listed at 3 retailers as of October 31, 2026, with prices from £1,189 to £2,403, a £1,214 spread on the same certified stone. Brilliant Earth lists it at £2,403. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.67
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677520630
Dimensions11.87 × 6.07 × 3.90 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
11.87 mm6.07 mm1.67 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677520630
Side View
Table 63.0%Crown 36.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 64.3%

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: Oct 31
Current: £2,403 GBP|Low: £1,106 GBP|High: £3,255 GBP|Avg: £2,503 GBP|-24.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 31, 2026
Retailer 2£1,189 GBP
Retailer 3£2,079 GBP
Brilliant Earth£2,403 GBP
Retailer 4£2,971 GBP
Retailer 5£3,255 GBP

11 data points across 5 retailers

3 retailers£1,189 GBP to £2,403 GBP

A
Cheapest Retailer
-
£1,189 GBP
$1,593 USD
B+
Retailer 2
-
£2,079 GBP
$2,785 USD
View
Most Expensive
B
Brilliant Earth
21403561Y · Oct 31
£2,403 GBP
$3,220 USD
View
2 more retailers have this diamond
Prices start from £1,189 GBPSave up to £1,214 GBP

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
1.67ct Marquise
£1,189 GBP