CaratHunter
Plans
Marquise|Lab Grown|IGI

1.70ct G VS1 Marquise Lab Grown Diamond

VG • G/VS1 • IGI LG502155355

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG502155355

Diamond specifications and retailer prices

From £1,028 GBP
$1,380 USD
As of November 2, 2026
Save £1,181 GBP (53%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £3,253 GBP at Loose Grown Diamond · As of November 1, 2026
View at Loose Grown Diamond

About this 1.7ct lab-grown marquise diamond

This 1.7ct lab-grown marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG502155355 or 502155355. Listed at 16 retailers as of November 2, 2026, with a 115% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.70
Carat
G
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.4°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG502155355
Dimensions12.41 × 6.27 × 3.58 mm
L/W Ratio1.98
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
12.41 mm6.27 mm1.70 ctG / VS1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG502155355
Side View
Table 59.5%Crown 37.4°Girdle: MED-STKPavilion 36°Culet: NoneDepth 57.1%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £3,253 GBP|Low: £1,028 GBP|High: £5,662 GBP|Avg: £3,129 GBP|+0.6%
Loose Grown Diamond
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 6£1,028 GBP
Retailer 10£1,799 GBP
Retailer 3£1,958 GBP
Retailer 4£2,014 GBP
Retailer 11£2,087 GBP
Retailer 13£2,868 GBP
Retailer 2£2,874 GBP
Retailer 9£3,128 GBP
Loose Grown Diamond£3,253 GBP
Retailer 7£3,836 GBP
Retailer 5£3,963 GBP
Retailer 12£5,572 GBP
Retailer 8£5,617 GBP

44 data points across 13 retailers

16 retailers£1,028 GBP to £2,209 GBP

B
Cheapest Retailer
-
£1,028 GBP
$1,380 USD
B
Retailer 2
-
£1,799 GBP
$2,414 USD
View
B
Retailer 3
-
£1,958 GBP
$2,627 USD
View
B
Retailer 4
-
£2,014 GBP
$2,703 USD
View
Final sale: no returns
Retailer 5
-
£2,087 GBP
$2,800 USD
View
Price last confirmed 21 days ago
B
Retailer 6
-
£2,087 GBP
$2,800 USD
View
B
Retailer 7
-
£2,209 GBP
$2,965 USD
View
Retailer 8
-
£2,868 GBP
$3,849 USD
View
Price under review
Retailer 9
-
£2,874 GBP
View
Price under review
Retailer 10
-
£3,128 GBP
$4,198 USD
View
Price under review
Most Expensive
Loose Grown Diamond
502155355 · Nov 1
£3,253 GBP
$4,366 USD
View
Price under review
10 more retailers have this diamond
Prices start from £1,028 GBPSave up to £1,181 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.

B
1.70ct Marquise
£1,028 GBP