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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 $309 AUD
$217 USD
As of October 27, 2026
Save $994 AUD (76%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,657 AUD 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

How it works →
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: $1,657 AUD|Low: $309 AUD|High: $1,685 AUD|Avg: $843 AUD|-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$309 AUD
Retailer 3$346 AUD
Retailer 13$357 AUD
Retailer 2$382 AUD
Retailer 8$492 AUD
Retailer 11$515 AUD
Retailer 12$704 AUD
Retailer 5$712 AUD
Retailer 9$756 AUD
Retailer 14$819 AUD
Retailer 10$1,227 AUD
Retailer 7$1,277 AUD
Retailer 4$1,303 AUD
Retailer 6$1,595 AUD
Rare Carat$1,657 AUD

42 data points across 15 retailers

16 retailers$309 AUD to $1,303 AUD

A
Cheapest Retailer
-
$309 AUD
$217 USD
A
Retailer 2
-
$346 AUD
$243 USD
View
Final sale: no returns
A
Retailer 3
-
$357 AUD
$251 USD
View
A
Retailer 4
-
$382 AUD
$269 USD
View
A
Retailer 5
-
$395 AUD
$278 USD
View
A
Retailer 6
-
$492 AUD
£272 GBP
View
B+
Retailer 7
-
$515 AUD
$362 USD
View
A
Retailer 8
-
$704 AUD
£390 GBP
View
B+
Retailer 9
-
$712 AUD
€477 EUR
View
B+
Retailer 10
-
$756 AUD
$532 USD
View
B+
Retailer 11
-
$819 AUD
$576 USD
View
B+
Retailer 12
-
$1,227 AUD
$863 USD
View
B
Retailer 13
-
$1,277 AUD
$898 USD
View
B
Retailer 14
-
$1,303 AUD
$916 USD
View
B
Retailer 15
-
$1,595 AUD
£883 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
Rare Carat
KG108-45A · Oct 18
$1,657 AUD
$1,165 USD
View
Price last confirmed 10 days ago
15 more retailers have this diamond
Prices start from $309 AUDSave up to $994 AUD

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
$309 AUD