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Round|Lab Grown|IGI

1.55ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG660459214

Certificate IGI LG660459214

Diamond specifications and retailer prices

From $1,421 AUD
As of November 6, 2026
Save $507 AUD (26%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $1,928 AUD at Zales · As of November 4, 2026
View at Zales

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 top-tier cut grade and certified by IGI LG660459214 or 660459214. Listed at 4 retailers as of November 4, 2026, with prices from $1,421 to $1,928, a $507 spread on the same certified stone. Zales lists it at $1,928. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG660459214
Dimensions7.47 × 7.51 × 4.52 mm
L/W Ratio1.01
Top View
7.47 mm7.51 mm1.55 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660459214
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.4%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
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Price History

Last verified: Nov 6
Current: $1,421 AUD|Low: $1,421 AUD|High: $2,757 AUD|Avg: $1,842 AUD|-48.4%
Retailer 1
Retailer 2
Retailer 3
Zales
November 6, 2026
Retailer 1$1,421 AUD
Retailer 2$1,421 AUD
Retailer 3$1,928 AUD
Zales$1,928 AUD

2 data points across 4 retailers

4 retailers$1,421 AUD to $1,928 AUD

B
Cheapest Retailer
-
$1,421 AUD
B
Retailer 2
-
$1,421 AUD
View
B
Retailer 3
-
$1,928 AUD
View
Most Expensive
B
Zales
523931874 · Nov 4
$1,928 AUD
$1,350 USD
View
3 more retailers have this diamond
Prices start from $1,421 AUDSave up to $507 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 Round
$1,421 AUD