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Radiant|Lab Grown|IGI

1.73ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG508155765

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

Certificate IGI LG508155765

Diamond specifications and retailer prices

From $1,086 AUD
$763 USD
As of October 30, 2026
Save $2,078 AUD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,766 AUD at MOH London · As of October 29, 2026
View at MOH London

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 D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG508155765 or 508155765. Listed at 13 retailers as of October 25, 2026, with a 191% 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
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.3°
Pavilion angle29.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508155765
Dimensions7.73 × 5.93 × 4.09 mm
L/W Ratio1.30
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
7.73 mm5.93 mm1.73 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508155765
Side View
Table 66.0%Crown 46.3°Girdle: Slightly ThickPavilion 29.9°Culet: NoneDepth 69.0%

Caratlytics Score

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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: Oct 30
Current: $4,766 AUD|Low: $776 AUD|High: $4,804 AUD|Avg: $1,938 AUD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 10$971 AUD
Retailer 3$1,056 AUD
Retailer 4$1,086 AUD
Retailer 5$1,118 AUD
Retailer 11$1,126 AUD
Retailer 7$1,381 AUD
Retailer 6$1,743 AUD
Retailer 2$1,802 AUD
Retailer 13$1,831 AUD
Retailer 8$2,256 AUD
Retailer 9$2,874 AUD
Retailer 12$3,165 AUD
MOH London$4,766 AUD

44 data points across 13 retailers

13 retailers$1,086 AUD to $3,165 AUD

Retailer 1
-
$971 AUD
$682 USD
Price last confirmed 8 days ago
Retailer 2
-
$1,056 AUD
$742 USD
View
Price last confirmed 7 days ago
B
Retailer 3
-
$1,086 AUD
$763 USD
View
Final sale: no returns
B
Retailer 4
-
$1,118 AUD
$785 USD
View
B
Retailer 5
-
$1,126 AUD
$791 USD
View
B
Retailer 6
-
$1,381 AUD
$970 USD
View
B
Retailer 7
-
$1,743 AUD
€1,166 EUR
View
B
Retailer 8
-
$1,802 AUD
£997 GBP
View
B
Retailer 9
-
$1,831 AUD
$1,286 USD
View
B
Retailer 10
-
$2,256 AUD
$1,585 USD
View
C
Retailer 11
-
$2,874 AUD
$2,019 USD
View
C
Retailer 12
-
$3,165 AUD
$2,223 USD
View
Most Expensive
MOH London
LG508155765 · Oct 29
$4,766 AUD
£2,636 GBP
View
Price under review
12 more retailers have this diamond
Prices start from $1,086 AUDSave up to $2,078 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.

B
1.73ct Radiant
$1,086 AUD