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Round|Lab Grown|IGI

1.72ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG455032750

Shape and cutting style on the report: Round brilliant

Certificate IGI LG455032750

Diamond specifications and retailer prices

From $374 AUD
$263 USD
As of October 30, 2026
Save $1,305 AUD (78%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,680 AUD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.72ct lab-grown round diamond

This 1.72ct lab-grown round sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG455032750 or 455032750. Listed at 15 retailers as of October 29, 2026, with prices from $374 to $1,680, a $1,305 spread on the same certified stone. Brilliant Earth lists it at $1,680. 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

1.72
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG455032750
Dimensions7.66 × 7.62 × 4.76 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory grown diamond was created by high pressure high temperature process (HPHT).
Top View
7.66 mm7.62 mm1.72 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG455032750
Side View
Table 59.5%Crown 35.6°GirdlePavilion 41.3°Culet: NoneDepth 62.4%

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 30
Current: $1,680 AUD|Low: $374 AUD|High: $2,150 AUD|Avg: $943 AUD|-21.9%
Brilliant Earth
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 11$374 AUD
Retailer 4$463 AUD
Retailer 12$562 AUD
Retailer 7$652 AUD
Retailer 3$698 AUD
Retailer 5$752 AUD
Retailer 2$785 AUD
Retailer 9$793 AUD
Retailer 8$1,095 AUD
Retailer 10$1,412 AUD
Retailer 6$1,671 AUD
Brilliant Earth$1,680 AUD

42 data points across 12 retailers

15 retailers$374 AUD to $1,680 AUD

Retailer 1
-
$373 AUD
$262 USD
Price last confirmed 38 days ago
A
Retailer 2
-
$374 AUD
$263 USD
View
Final sale: no returns
Retailer 3
-
$433 AUD
$304 USD
View
Price last confirmed 38 days ago
Retailer 4
-
$456 AUD
$320 USD
View
Price last confirmed 35 days ago
B+
Retailer 5
-
$562 AUD
$395 USD
View
Retailer 6
-
$652 AUD
£361 GBP
View
Price last confirmed 14 days ago
A
Retailer 7
-
$752 AUD
€503 EUR
View
A
Retailer 8
-
$785 AUD
£434 GBP
View
A
Retailer 9
-
$793 AUD
$557 USD
View
B+
Retailer 10
-
$1,095 AUD
$769 USD
View
Retailer 11
-
$1,295 AUD
$910 USD
View
Price last confirmed 39 days ago
B
Retailer 12
-
$1,412 AUD
$992 USD
View
Retailer 13
-
$1,485 AUD
$1,043 USD
View
Price last confirmed 40 days ago
B
Retailer 14
-
$1,671 AUD
£924 GBP
View
Most Expensive
B
Brilliant Earth
14242415A · Oct 29
$1,680 AUD
$1,180 USD
View
14 more retailers have this diamond
Prices start from $374 AUDSave up to $1,305 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
1.72ct Round
$374 AUD