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Radiant|Lab Grown|IGI

1.86ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG506191278

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG506191278

Diamond specifications and retailer prices

From £1,672 GBP
$2,240 USD
As of October 31, 2026
Save £1,191 GBP (42%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,200 GBP at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 1.86ct lab-grown radiant diamond

This 1.86ct lab-grown radiant sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG506191278 or 506191278. Listed at 18 retailers as of October 30, 2026, with a 71% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.86
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.7°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG506191278
Dimensions8.05 × 6.07 × 4.29 mm
L/W Ratio1.33
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
8.05 mm6.07 mm1.86 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG506191278
Side View
Table 66.0%Crown 45.7°Girdle: STK-THKPavilion 31.3°Culet: NoneDepth 70.7%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £4,200 GBP|Low: £1,672 GBP|High: £6,198 GBP|Avg: £3,393 GBP|+2.4%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 1, 2026
Retailer 11£1,672 GBP
Retailer 13£1,970 GBP
Retailer 5£2,143 GBP
Retailer 7£2,205 GBP
Retailer 6£2,285 GBP
Retailer 14£2,285 GBP
Retailer 8£2,863 GBP
Retailer 2£3,060 GBP
Retailer 4£3,140 GBP
Retailer 12£3,352 GBP
Retailer 3£3,557 GBP
Cape Diamonds£4,200 GBP
Retailer 10£5,697 GBP
Retailer 15£6,100 GBP
Retailer 9£6,150 GBP

42 data points across 15 retailers

18 retailers£1,672 GBP to £2,863 GBP

B
Cheapest Retailer
-
£1,672 GBP
$2,240 USD
B
Retailer 2
-
£1,970 GBP
$2,639 USD
View
B
Retailer 3
-
£2,143 GBP
$2,871 USD
View
B
Retailer 4
-
£2,205 GBP
$2,954 USD
View
Final sale: no returns
Retailer 5
-
£2,285 GBP
$3,061 USD
View
Price last confirmed 19 days ago
B
Retailer 6
-
£2,285 GBP
$3,061 USD
View
B
Retailer 7
-
£2,407 GBP
$3,225 USD
View
B
Retailer 8
-
£2,863 GBP
View
Retailer 9
-
£3,060 GBP
View
Price under review
Retailer 10
-
£3,140 GBP
$4,207 USD
View
Price under review
Retailer 11
-
£3,352 GBP
$4,491 USD
View
Price under review
Retailer 12
-
£3,557 GBP
$4,766 USD
View
Price under review
Most Expensive
Cape Diamonds
cert_506191278 · Oct 29
£4,200 GBP
ZAR 90,906 ZAR
View
Price under review
12 more retailers have this diamond
Prices start from £1,672 GBPSave up to £1,191 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
1.86ct Radiant
£1,672 GBP