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Radiant|Lab Grown|IGI

1.73ct E SI1 Radiant Lab Grown Diamond

VG • E/SI1 • IGI LG530214397

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

Certificate IGI LG530214397

Diamond specifications and retailer prices

From £163 GBP
$217 USD
As of October 27, 2026
Save £525 GBP (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £875 GBP at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.73ct lab-grown radiant diamond

This 1.73ct 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 LG530214397 or 530214397. Listed at 16 retailers as of October 27, 2026, with a 322% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.73
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.6°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG530214397
Dimensions8.32 × 5.98 × 4.13 mm
L/W Ratio1.39
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
8.32 mm5.98 mm1.73 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG530214397
Side View
Table 65.5%Crown 43.6°Girdle: MediumPavilion 36.2°Culet: NoneDepth 69.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: £875 GBP|Low: £163 GBP|High: £890 GBP|Avg: £445 GBP|-1.7%
Rare Carat
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
October 29, 2026
Retailer 15£163 GBP
Retailer 3£182 GBP
Retailer 13£188 GBP
Retailer 8£202 GBP
Retailer 9£260 GBP
Retailer 12£272 GBP
Retailer 2£373 GBP
Retailer 5£376 GBP
Retailer 10£399 GBP
Retailer 14£433 GBP
Retailer 11£648 GBP
Retailer 7£674 GBP
Retailer 4£688 GBP
Retailer 6£842 GBP
Rare Carat£875 GBP

41 data points across 15 retailers

16 retailers£163 GBP to £688 GBP

A
Cheapest Retailer
-
£163 GBP
$217 USD
A
Retailer 2
-
£182 GBP
$243 USD
View
Final sale: no returns
A
Retailer 3
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£188 GBP
$251 USD
View
A
Retailer 4
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£202 GBP
$269 USD
View
A
Retailer 5
-
£209 GBP
$278 USD
View
A
Retailer 6
-
£260 GBP
View
B+
Retailer 7
-
£272 GBP
$362 USD
View
A
Retailer 8
-
£373 GBP
View
B+
Retailer 9
-
£376 GBP
€477 EUR
View
B+
Retailer 10
-
£399 GBP
$532 USD
View
B+
Retailer 11
-
£433 GBP
$576 USD
View
B+
Retailer 12
-
£648 GBP
$863 USD
View
B
Retailer 13
-
£674 GBP
$898 USD
View
B
Retailer 14
-
£688 GBP
$916 USD
View
B
Retailer 15
-
£842 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Rare Carat
KG108-45A · Oct 18
£875 GBP
$1,165 USD
View
Price last confirmed 10 days ago
15 more retailers have this diamond
Prices start from £163 GBPSave up to £525 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
1.73ct Radiant
£163 GBP