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Marquise|Lab Grown|IGI

3.51ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1

Diamond specifications and retailer prices

From £394 GBP
$529 USD
As of October 8, 2026
10 retailers carry this diamond
Most expensive: £2,935 GBP at Helzberg Diamonds · As of September 27, 2026
View at Helzberg Diamonds

About this 3.51ct lab-grown marquise diamond

This 3.51ct lab-grown marquise sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI. Listed at 10 retailers as of September 27, 2026. 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

3.51
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions15.32 × 7.91 × 4.99 mm
L/W Ratio1.94
Top View
15.32 mm7.91 mm3.51 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 8
Current: £2,935 GBP|Low: £394 GBP|High: £3,611 GBP|Avg: £1,648 GBP|-18.7%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 24, 2026
Retailer 5£394 GBP
Retailer 2£442 GBP
Retailer 4£489 GBP
Retailer 6£768 GBP
Retailer 3£1,420 GBP
Retailer 7£1,838 GBP
Retailer 8£1,971 GBP
Helzberg Diamonds£2,935 GBP

9 data points across 8 retailers

10 retailers£394 GBP to £2,935 GBP

Retailer 1
-
£394 GBP
$529 USD
Price last confirmed 25 days ago
Retailer 2
-
£394 GBP
$529 USD
View
Price last confirmed 10 days ago
Retailer 3
-
£442 GBP
$593 USD
View
Price last confirmed 9 days ago
Retailer 4
-
£489 GBP
$656 USD
View
Price last confirmed 25 days ago
Retailer 5
-
£489 GBP
$656 USD
View
Price last confirmed 8 days ago
Retailer 6
-
£768 GBP
$1,030 USD
View
Price last confirmed 9 days ago
Retailer 7
-
£1,420 GBP
$1,906 USD
View
Price last confirmed 26 days ago
Retailer 8
-
£1,420 GBP
$1,906 USD
View
Price last confirmed 8 days ago
B
Retailer 9
-
£1,838 GBP
$2,467 USD
View
Price last confirmed 7 days ago
Most Expensive
Helzberg Diamonds
ZXZOHOMLJHGL · Sep 27
£2,935 GBP
$3,938 USD
View
Price last confirmed 37 days ago
9 more retailers have this diamond

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
3.51ct Marquise
£394 GBP