CaratHunter
Plans
Round|Lab Grown|IGI

1.55ct D SI1 Round Lab Grown Diamond

VG • D/SI1 • IGI LG784643985

Shape and cutting style on the report: Round brilliant

Certificate IGI LG784643985

Diamond specifications and retailer prices

From $291 AUD
As of November 1, 2026
Save $1,594 AUD (85%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,886 AUD at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 1.55ct lab-grown round diamond

This 1.55ct 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 very-good cut grade and certified by IGI LG784643985 or 784643985. Listed at 14 retailers as of November 1, 2026, with prices from $291 to $1,886, a $1,594 spread on the same certified stone. Brilliant Earth lists it at $1,886. 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

1.55
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784643985
Dimensions7.41 × 7.32 × 4.55 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.41 mm7.32 mm1.55 ctD / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG784643985
Side View
Table 59.0%Crown 37°Girdle: MED-THKPavilion 40.4°Culet: NoneDepth 61.6%

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: Nov 1
Current: $1,886 AUD|Low: $183 AUD|High: $2,400 AUD|Avg: $891 AUD|-21.4%
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 6, 2026
Retailer 7$183 AUD
Retailer 12$291 AUD
Retailer 13$326 AUD
Retailer 3$360 AUD
Retailer 2$609 AUD
Retailer 15$624 AUD
Retailer 11$654 AUD
Retailer 4$657 AUD
Retailer 14$729 AUD
Retailer 10$967 AUD
Retailer 8$1,057 AUD
Retailer 6$1,234 AUD
Retailer 9$1,684 AUD
Retailer 5$1,720 AUD
Brilliant Earth$1,886 AUD

36 data points across 15 retailers

14 retailers$291 AUD to $1,886 AUD

A
Cheapest Retailer
-
$291 AUD
A
Retailer 2
-
$326 AUD
View
Final sale: no returns
Retailer 3
-
$356 AUD
View
Price last confirmed 52 days ago
Retailer 4
-
$360 AUD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$609 AUD
View
B+
Retailer 6
-
$624 AUD
View
B+
Retailer 7
-
$654 AUD
View
B+
Retailer 8
-
$657 AUD
View
B+
Retailer 9
-
$729 AUD
View
B+
Retailer 10
-
$967 AUD
View
B
Retailer 11
-
$1,057 AUD
View
B
Retailer 12
-
$1,234 AUD
View
B
Retailer 13
-
$1,684 AUD
View
Most Expensive
B
Brilliant Earth
20185628A · Nov 3
$1,886 AUD
$1,320 USD
View
13 more retailers have this diamond
Prices start from $291 AUDSave up to $1,594 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
1.55ct Round
$291 AUD