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Radiant|Lab Grown|IGI

1.55ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1

Diamond specifications and retailer prices

From $706 AUD
$496 USD
As of November 2, 2026
Save $1,596 AUD (69%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,302 AUD at NZ Jewellers · As of November 1, 2026
View at NZ Jewellers

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 top-tier cut grade and certified by IGI. Listed at 4 retailers as of November 1, 2026, with prices from $706 to $2,302, a $1,596 spread on the same certified stone. NZ Jewellers lists it at $2,302. 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

1.55
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.49 × 5.78 × 3.93 mm
L/W Ratio1.30
Top View
7.49 mm5.78 mm1.55 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 65.5%CrownGirdlePavilionCulet: NoneDepth 68.0%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: $2,302 AUD|Low: $508 AUD|High: $2,302 AUD|Avg: $1,064 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 7$508 AUD
Retailer 4$706 AUD
Retailer 3$790 AUD
Retailer 2$876 AUD
Retailer 5$977 AUD
Retailer 6$1,623 AUD
NZ Jewellers$2,302 AUD

8 data points across 7 retailers

4 retailers$706 AUD to $2,302 AUD

B+
Cheapest Retailer
-
$706 AUD
$496 USD
B+
Retailer 2
-
$790 AUD
$555 USD
View
B+
Retailer 3
-
$876 AUD
$615 USD
View
Most Expensive
C
NZ Jewellers
5e62c297-61fa-463e-8ceb-37a62756b469 · Nov 1
$2,302 AUD
$1,617 USD
View
3 more retailers have this diamond
Prices start from $706 AUDSave up to $1,596 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
$706 AUD