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Radiant|Lab Grown|IGI

1.55ct D SI1 Radiant Lab Grown Diamond

GD • D/SI1 • IGI LG514271363

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG514271363

Diamond specifications and retailer prices

From $790 AUD
$555 USD
As of October 30, 2026
Save $2,869 AUD (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $3,659 AUD at MOH London · As of October 26, 2026
View at MOH London

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant 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 LG514271363 or 514271363. Listed at 14 retailers as of October 26, 2026, with prices from $790 to $3,659, a $2,869 spread on the same certified stone. MOH London lists it at $3,659. 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
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.2°
Pavilion angle30.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514271363
Dimensions7.49 × 5.78 × 3.93 mm
L/W Ratio1.30
Girdle conditionFaceted
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
7.49 mm5.78 mm1.55 ctD / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514271363
Side View
Table 65.5%Crown 42.2°Girdle: MediumPavilion 30.2°Culet: NoneDepth 68.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $3,659 AUD|Low: $565 AUD|High: $3,699 AUD|Avg: $1,464 AUD|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 1, 2026
Retailer 10$706 AUD
Retailer 3$790 AUD
Retailer 4$790 AUD
Retailer 11$876 AUD
Retailer 5$878 AUD
Retailer 9$1,075 AUD
Retailer 6$1,275 AUD
Retailer 13$1,362 AUD
Retailer 2$1,444 AUD
Retailer 7$1,680 AUD
Retailer 12$2,302 AUD
Retailer 8$2,353 AUD
MOH London$3,659 AUD

43 data points across 13 retailers

14 retailers$790 AUD to $3,659 AUD

Retailer 1
-
$706 AUD
$496 USD
Price last confirmed 9 days ago
B+
Retailer 2
-
$790 AUD
$555 USD
View
Final sale: no returns
Retailer 3
-
$790 AUD
$555 USD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$876 AUD
$615 USD
View
B+
Retailer 5
-
$878 AUD
$617 USD
View
B
Retailer 6
-
$1,075 AUD
$755 USD
View
B
Retailer 7
-
$1,275 AUD
€853 EUR
View
B
Retailer 8
-
$1,362 AUD
$957 USD
View
B
Retailer 9
-
$1,444 AUD
£799 GBP
View
B
Retailer 10
-
$1,680 AUD
$1,180 USD
View
B
Retailer 11
-
$2,035 AUD
£1,126 GBP
View
C
Retailer 12
-
$2,302 AUD
$1,617 USD
View
C
Retailer 13
-
$2,353 AUD
$1,653 USD
View
Most Expensive
B
MOH London
LG514271363 · Oct 26
$3,659 AUD
£2,024 GBP
View
13 more retailers have this diamond
Prices start from $790 AUDSave up to $2,869 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.

B+
1.55ct Radiant
$790 AUD