CaratHunter
Plans
Radiant|Lab Grown|IGI

1.51ct D SI1 Radiant Lab Grown Diamond

VG • D/SI1 • IGI LG12417712

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

Certificate IGI LG12417712

Diamond specifications and retailer prices

From £147 GBP
As of November 6, 2026
Save £1,205 GBP (89%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,352 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG12417712 or 12417712. Listed at 9 retailers as of November 2, 2026, with prices from £147 to £1,352, a £1,205 spread on the same certified stone. Do Amore Diamonds lists it at £1,352. 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

1.51
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.6°
Pavilion angle31.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12417712
Dimensions7.26 × 5.78 × 4.05 mm
L/W Ratio1.26
Cert comments
As Grown - No indications of post-growth treatment. This Laboratory Grown Diamond was created by High Pressure High Tempertature (HPHT) growth process.
Top View
7.26 mm5.78 mm1.51 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12417712
Side View
Table 63.5%Crown 42.6°Girdle: STK-THKPavilion 31.8°Culet: NoneDepth 70.1%

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 6
Current: £1,352 GBP|Low: £135 GBP|High: £1,352 GBP|Avg: £628 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 3£147 GBP
Retailer 7£170 GBP
Retailer 6£317 GBP
Retailer 5£588 GBP
Retailer 2£628 GBP
Retailer 4£647 GBP
Retailer 8£777 GBP
Retailer 9£911 GBP
Do Amore Diamonds£1,352 GBP

18 data points across 9 retailers

9 retailers£147 GBP to £1,352 GBP

A
Cheapest Retailer
-
£147 GBP
A
Retailer 2
-
£170 GBP
View
B+
Retailer 3
-
£317 GBP
View
B
Retailer 4
-
£588 GBP
View
B
Retailer 5
-
£628 GBP
View
B
Retailer 6
-
£647 GBP
View
Retailer 7
-
£777 GBP
View
Price last confirmed 9 days ago
B
Retailer 8
-
£911 GBP
View
Most Expensive
B
Do Amore Diamonds
27-F96B3FBEF · Nov 2
£1,352 GBP
$1,810 USD
View
8 more retailers have this diamond
Prices start from £147 GBPSave up to £1,205 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
1.51ct Radiant
£147 GBP