CaratHunter
Plans
Oval|Lab Grown|IGI

1.50ct D SI1 Oval Lab Grown Diamond

EX • D/SI1 • IGI LG750578537

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG750578537

Diamond specifications and retailer prices

From $223 USD
As of October 29, 2026
Save $937 USD (81%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,160 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.5ct lab-grown oval diamond

This 1.5ct lab-grown oval 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 LG750578537 or 750578537. Listed at 15 retailers as of October 29, 2026, with prices from $223 to $1,160, a $937 spread on the same certified stone. Brilliant Earth lists it at $1,160. 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

1.50
Carat
D
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle43.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG750578537
Dimensions8.91 × 6.45 × 4.18 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizeNone
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
8.91 mm6.45 mm1.50 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG750578537
Side View
Table 59.0%Crown 32.7°Girdle: STK-THKPavilion 43.2°Culet: NoneDepth 64.8%

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 29
Current: $1,160 USD|Low: $223 USD|High: $1,200 USD|Avg: $658 USD|-3.3%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 30, 2026
Retailer 6$223 USD
Retailer 4$295 USD
Retailer 8$441 USD
Retailer 2$473 USD
Retailer 11$493 USD
Retailer 5$516 USD
Retailer 10$597 USD
Retailer 9$711 USD
Retailer 3$930 USD
Retailer 7$1,078 USD
Brilliant Earth$1,160 USD

44 data points across 11 retailers

15 retailers$223 USD to $1,160 USD

A
Cheapest Retailer
-
$223 USD
A
Retailer 2
-
$251 USD
View
A
Retailer 3
-
$269 USD
View
A
Retailer 4
-
$269 USD
View
A
Retailer 5
-
$295 USD
View
Final sale: no returns
A
Retailer 6
-
$441 USD
€420 EUR
View
A
Retailer 7
-
$473 USD
View
A
Retailer 8
-
$493 USD
View
B+
Retailer 9
-
$516 USD
£406 GBP
View
B+
Retailer 10
-
$597 USD
View
B
Retailer 11
-
$711 USD
View
B
Retailer 12
-
$864 USD
View
Retailer 13
-
$930 USD
View
Price last confirmed 9 days ago
B
Retailer 14
-
$1,078 USD
£849 GBP
View
Most Expensive
B
Brilliant Earth
18445931A · Oct 29
$1,160 USD
View
14 more retailers have this diamond
Prices start from $223 USDSave up to $937 USD

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
1.50ct Oval
$223 USD