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Round|Lab Grown|IGI

1.73ct I SI2 Round Lab Grown Diamond

EX • I/SI2 • IGI LG451057633

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451057633

Diamond specifications and retailer prices

From $1,367 AUD
$960 USD
As of October 30, 2026
Save $3,002 AUD (69%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,693 AUD at MOH London · As of October 21, 2026
View at MOH London

About this 1.73ct lab-grown round diamond

This 1.73ct lab-grown round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451057633 or 451057633. Listed at 10 retailers as of October 30, 2026, with a 220% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.73
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057633
Dimensions7.67 × 7.63 × 4.72 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.67 mm7.63 mm1.73 ctI / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451057633
Side View
Table 60.0%Crown 36.3°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $6,693 AUD|Low: $1,367 AUD|High: $6,747 AUD|Avg: $3,335 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
October 30, 2026
Retailer 2$1,367 AUD
Retailer 5$2,010 AUD
Retailer 9$2,187 AUD
Retailer 8$2,251 AUD
Retailer 6$2,332 AUD
Retailer 3$2,595 AUD
Retailer 12$3,190 AUD
Retailer 7$3,679 AUD
Retailer 11$4,231 AUD
Retailer 10$4,369 AUD
Retailer 4$5,219 AUD
MOH London$6,693 AUD

15 data points across 12 retailers

10 retailers$1,367 AUD to $4,369 AUD

A
Cheapest Retailer
-
$1,367 AUD
$960 USD
B+
Retailer 2
-
$2,010 AUD
$1,412 USD
View
B+
Retailer 3
-
$2,187 AUD
$1,536 USD
View
B+
Retailer 4
-
$2,251 AUD
$1,581 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,332 AUD
$1,638 USD
View
Retailer 6
-
$2,332 AUD
$1,638 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
$3,679 AUD
$2,584 USD
View
B
Retailer 8
-
$4,231 AUD
$2,972 USD
View
B
Retailer 9
-
$4,369 AUD
$3,069 USD
View
Most Expensive
MOH London
LG451057633 · Oct 21
$6,693 AUD
£3,702 GBP
View
Price last confirmed 9 days ago
9 more retailers have this diamond
Prices start from $1,367 AUDSave up to $3,002 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 Round
$1,367 AUD