Round|Lab Grown|GIA

1.55ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • GIA 2474519311

Certificate GIA 2474519311

Diamond specifications and retailer prices

From $331 USD
As of November 5, 2026
Save $1,309 USD (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,640 USD 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 $331 to $1,640, a $1,309 spread on the same certified stone. Brilliant Earth lists it at $1,640. 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
Color
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: $1,640 USD|Low: $323 USD|High: $1,694 USD|Avg: $760 USD
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$331 USD
Retailer 8$377 USD
Retailer 14$384 USD
Retailer 15$410 USD
Retailer 6$415 USD
Retailer 4$552 USD
Retailer 13$565 USD
Retailer 16$575 USD
Retailer 2$636 USD
Retailer 11$657 USD
Retailer 5$707 USD
Retailer 7$748 USD
Retailer 9$1,203 USD
Retailer 12$1,318 USD
Retailer 10$1,638 USD
Brilliant Earth$1,640 USD

45 data points across 16 retailers

16 retailers$331 USD to $1,640 USD

A
Cheapest Retailer
-
$331 USD
A
Retailer 2
-
$377 USD
View
Final sale: no returns
A
Retailer 3
-
$384 USD
View
A
Retailer 4
-
$410 USD
View
Retailer 5
-
$415 USD
View
Price last confirmed 12 days ago
A
Retailer 6
-
$552 USD
View
A
Retailer 7
-
$565 USD
View
A
Retailer 8
-
$575 USD
View
B+
Retailer 9
-
$636 USD
View
B+
Retailer 10
-
$657 USD
View
B+
Retailer 11
-
$707 USD
View
B+
Retailer 12
-
$748 USD
View
B
Retailer 13
-
$1,203 USD
View
B
Retailer 14
-
$1,318 USD
View
B
Retailer 15
-
$1,638 USD
View
Most Expensive
B
Brilliant Earth
13393592A · Oct 31
$1,640 USD
View
15 more retailers have this diamond
Prices start from $331 USDSave up to $1,309 USD

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
$331 USD