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Princess|Lab Grown|IGI

1.51ct D SI1 Princess Lab Grown Diamond

GD • D/SI1 • IGI LG510159147

Shape and cutting style on the report: Princess cut

Certificate IGI LG510159147

Diamond specifications and retailer prices

From $313 AUD
$220 USD
As of October 30, 2026
Save $1,281 AUD (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,594 AUD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.51ct lab-grown princess diamond

This 1.51ct lab-grown princess 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 LG510159147 or 510159147. Listed at 19 retailers as of October 30, 2026, with prices from $313 to $1,594, a $1,281 spread on the same certified stone. Brilliant Earth lists it at $1,594. 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

1.51
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.3°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG510159147
Dimensions6.29 × 6.09 × 4.42 mm
L/W Ratio1.03
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
6.29 mm6.09 mm1.51 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG510159147
Side View
Table 69.0%Crown 41.3°Girdle: Slightly ThickPavilion 38.3°Culet: NoneDepth 72.6%

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: $1,594 AUD|Low: $313 AUD|High: $1,836 AUD|Avg: $951 AUD|-13.2%
Brilliant Earth
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
November 1, 2026
Retailer 5$313 AUD
Retailer 3$363 AUD
Retailer 7$369 AUD
Retailer 12$387 AUD
Retailer 13$387 AUD
Retailer 10$644 AUD
Retailer 11$663 AUD
Retailer 15$710 AUD
Retailer 8$720 AUD
Retailer 9$1,006 AUD
Retailer 14$1,246 AUD
Retailer 4$1,321 AUD
Retailer 6$1,466 AUD
Retailer 2$1,553 AUD
Brilliant Earth$1,594 AUD

41 data points across 15 retailers

19 retailers$313 AUD to $1,594 AUD

A
Cheapest Retailer
-
$313 AUD
$220 USD
Retailer 2
-
$329 AUD
$231 USD
View
Price last confirmed 40 days ago
A
Retailer 3
-
$363 AUD
$255 USD
View
B+
Retailer 4
-
$369 AUD
$259 USD
View
Final sale: no returns
Retailer 5
-
$382 AUD
$268 USD
View
Price last confirmed 38 days ago
B+
Retailer 6
-
$387 AUD
$272 USD
View
Retailer 7
-
$387 AUD
$272 USD
View
Price last confirmed 7 days ago
Retailer 8
-
$403 AUD
$283 USD
View
Price last confirmed 37 days ago
B+
Retailer 9
-
$644 AUD
€431 EUR
View
B+
Retailer 10
-
$663 AUD
$466 USD
View
B+
Retailer 11
-
$710 AUD
$499 USD
View
B+
Retailer 12
-
$720 AUD
£398 GBP
View
B
Retailer 13
-
$1,006 AUD
$707 USD
View
B
Retailer 14
-
$1,246 AUD
$875 USD
View
Retailer 15
-
$1,315 AUD
$924 USD
View
Price last confirmed 12 days ago
B
Retailer 16
-
$1,321 AUD
$928 USD
View
Retailer 17
-
$1,466 AUD
$1,030 USD
View
Price last confirmed 11 days ago
B
Retailer 18
-
$1,553 AUD
£859 GBP
View
Most Expensive
B
Brilliant Earth
14251613A · Oct 31
$1,594 AUD
$1,120 USD
View
18 more retailers have this diamond
Prices start from $313 AUDSave up to $1,281 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
1.51ct Princess
$313 AUD