Radiant|Lab Grown|GIA

1.20ct I VS1 Radiant Lab Grown Diamond

EX • I/VS1 • GIA 5426559987

Certificate GIA 5426559987

Diamond specifications and retailer prices

From £279 GBP
As of November 4, 2026
Save £1,061 GBP (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,215 GBP at Do Amore Diamonds · As of November 4, 2026
View at Do Amore Diamonds

About this 1.2ct lab-grown radiant diamond

This 1.2ct lab-grown radiant sits in the classic one-carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5426559987. Listed at 11 retailers as of October 29, 2026, with a 380% 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

1.20
Carat
I
Colour
VS1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
CertificateGIA 5426559987
Dimensions7.90 × 5.14 × 3.44 mm
L/W Ratio1.54
Culet sizeNone
Top View
7.90 mm5.14 mm1.20 ctI / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5426559987
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,215 GBP|Low: £279 GBP|High: £2,215 GBP|Avg: £941 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 4£279 GBP
Retailer 6£311 GBP
Retailer 7£425 GBP
Retailer 3£498 GBP
Retailer 9£838 GBP
Retailer 8£1,222 GBP
Retailer 2£1,340 GBP
Retailer 5£1,341 GBP
Do Amore Diamonds£2,215 GBP

9 data points across 9 retailers

11 retailers£279 GBP to £1,340 GBP

Retailer 1
-
£249 GBP
Price last confirmed 18 days ago
A
Retailer 2
-
£279 GBP
View
Final sale: no returns
Retailer 3
-
£289 GBP
View
Price last confirmed 21 days ago
Retailer 4
-
£309 GBP
View
Price last confirmed 32 days ago
A
Retailer 5
-
£311 GBP
View
B+
Retailer 6
-
£498 GBP
View
Retailer 7
-
£1,097 GBP
View
Price last confirmed 19 days ago
B
Retailer 8
-
£1,222 GBP
View
B
Retailer 9
-
£1,340 GBP
View
Retailer 10
-
£1,341 GBP
View
Price last confirmed 19 days ago
Most Expensive
Do Amore Diamonds
27-FD05F8366 · Nov 4
£2,215 GBP
$2,970 USD
View
Price under review
10 more retailers have this diamond
Prices start from £279 GBPSave up to £1,061 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
1.20ct Radiant
£279 GBP