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1.55ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • GIA 2474519311

Certificate GIA 2474519311

Diamond specifications and retailer prices

From $589 NZD
As of November 5, 2026
Save $2,329 NZD (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,917 NZD at Brilliant Earth · As of October 31, 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 top-tier cut grade and certified by GIA 2474519311. Listed at 16 retailers as of October 31, 2026, with prices from $589 to $2,917, a $2,329 spread on the same certified stone. Brilliant Earth lists it at $2,917. 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
Crown angle35°
Pavilion angle41°
OriginLab Grown
Grading LabGIA
CertificateGIA 2474519311
Dimensions7.39 × 7.35 × 4.60 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.39 mm7.35 mm1.55 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2474519311
Side View
Table 57.0%Crown 35°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.5%

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 5
Current: $2,917 NZD|Low: $575 NZD|High: $3,013 NZD|Avg: $1,352 NZD
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
Retailer 16
November 6, 2026
Retailer 3$589 NZD
Retailer 8$671 NZD
Retailer 14$683 NZD
Retailer 15$729 NZD
Retailer 6$738 NZD
Retailer 4$982 NZD
Retailer 13$1,005 NZD
Retailer 16$1,023 NZD
Retailer 2$1,131 NZD
Retailer 11$1,169 NZD
Retailer 5$1,258 NZD
Retailer 7$1,331 NZD
Retailer 9$2,140 NZD
Retailer 12$2,345 NZD
Retailer 10$2,914 NZD
Brilliant Earth$2,917 NZD

45 data points across 16 retailers

16 retailers$589 NZD to $2,917 NZD

A
Cheapest Retailer
-
$589 NZD
A
Retailer 2
-
$671 NZD
View
Final sale: no returns
A
Retailer 3
-
$683 NZD
View
A
Retailer 4
-
$729 NZD
View
Retailer 5
-
$738 NZD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$982 NZD
View
A
Retailer 7
-
$1,005 NZD
View
A
Retailer 8
-
$1,023 NZD
View
B+
Retailer 9
-
$1,131 NZD
View
B+
Retailer 10
-
$1,169 NZD
View
B+
Retailer 11
-
$1,258 NZD
View
B+
Retailer 12
-
$1,331 NZD
View
B
Retailer 13
-
$2,140 NZD
View
B
Retailer 14
-
$2,345 NZD
View
B
Retailer 15
-
$2,914 NZD
View
Most Expensive
B
Brilliant Earth
13393592A · Oct 31
$2,917 NZD
$1,640 USD
View
15 more retailers have this diamond
Prices start from $589 NZDSave up to $2,329 NZD

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
$589 NZD