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Radiant|Lab Grown|IGI

1.53ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG496117921

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

Certificate IGI LG496117921

Diamond specifications and retailer prices

From £116 GBP
$155 USD
As of October 27, 2026
Save £642 GBP (85%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £758 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 1.53ct lab-grown radiant diamond

This 1.53ct 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 standard cut grade and certified by IGI LG496117921 or 496117921. Listed at 15 retailers as of October 27, 2026, with prices from £116 to £758, a £642 spread on the same certified stone. Rare Carat lists it at £758. 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

1.53
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40°
Pavilion angle29°
OriginLab Grown
Grading LabIGI
CertificateIGI LG496117921
Dimensions7.64 × 5.62 × 3.86 mm
L/W Ratio1.36
Culet sizePointed
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
7.64 mm5.62 mm1.53 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG496117921
Side View
Table 62.5%Crown 40°Girdle: MED-STKPavilion 29°Culet: NoneDepth 68.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: £758 GBP|Low: £111 GBP|High: £858 GBP|Avg: £360 GBP|-11.7%
Rare Carat
Retailer 2
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Retailer 11
Retailer 12
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Retailer 17
October 28, 2026
Retailer 15£116 GBP
Retailer 13£134 GBP
Retailer 14£143 GBP
Retailer 17£143 GBP
Retailer 7£158 GBP
Retailer 10£250 GBP
Retailer 2£259 GBP
Retailer 3£262 GBP
Retailer 6£363 GBP
Retailer 5£396 GBP
Retailer 9£459 GBP
Retailer 16£461 GBP
Retailer 4£470 GBP
Retailer 12£487 GBP
Retailer 8£503 GBP
Retailer 11£672 GBP
Rare Carat£758 GBP

40 data points across 17 retailers

15 retailers£116 GBP to £758 GBP

A
Cheapest Retailer
-
£116 GBP
$155 USD
B+
Retailer 2
-
£134 GBP
$180 USD
View
B+
Retailer 3
-
£143 GBP
$192 USD
View
A
Retailer 4
-
£143 GBP
$192 USD
View
B+
Retailer 5
-
£250 GBP
View
B+
Retailer 6
-
£259 GBP
View
B
Retailer 7
-
£262 GBP
$351 USD
View
B+
Retailer 8
-
£363 GBP
$487 USD
View
B+
Retailer 9
-
£396 GBP
$531 USD
View
B
Retailer 10
-
£459 GBP
HK$4,800 HKD
View
B+
Retailer 11
-
£461 GBP
$618 USD
View
B
Retailer 12
-
£487 GBP
$653 USD
View
B
Retailer 13
-
£503 GBP
$673 USD
View
B
Retailer 14
-
£672 GBP
View
Most Expensive
B
Rare Carat
496117921_l_496117921 · Oct 28
£758 GBP
$1,015 USD
View
14 more retailers have this diamond
Prices start from £116 GBPSave up to £642 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
1.53ct Radiant
£116 GBP