CaratHunter
Plans
Radiant|Lab Grown|IGI

1.51ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG536278905

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

Certificate IGI LG536278905

Diamond specifications and retailer prices

From $707 USD
£557 GBP
As of November 5, 2026
1 retailer carries this diamond
Only listing: $707 USD at Diamond Quarter
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Diamond Quarter

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 E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG536278905 or 536278905. Listed at a single retailer as of November 5, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
E
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.8°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG536278905
Dimensions8.00 × 5.71 × 3.91 mm
L/W Ratio1.40
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.00 mm5.71 mm1.51 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG536278905
Side View
Table 67.0%Crown 43.8°Girdle: Slightly ThickPavilion 36.4°Culet: NoneDepth 68.5%

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 5
Current: $744 USD|Low: $435 USD|High: $807 USD|Avg: $657 USD|-7.8%
Retailer 1
Retailer 2
Retailer 3
January 17, 2026
Retailer 2$435 USD
Retailer 3$633 USD
Retailer 1$744 USD

20 data points across 3 retailers

1 retailer

B
Diamond Quarter
1.51SI1ELG05066EN · Nov 5
$707 USD
£557 GBP
View

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
1.51ct Radiant
$707 USD