Round|Natural|GIA

1.55ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1533953411

Certificate GIA 1533953411

Diamond specifications and retailer prices

From $3,240 USD
As of November 6, 2026
Save $2,379 USD (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,870 USD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1533953411. Listed at 11 retailers as of November 4, 2026, with a 73% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1533953411
Dimensions7.41 × 7.35 × 4.60 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
7.41 mm7.35 mm1.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1533953411
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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 6
Current: $3,465 USD|Low: $2,911 USD|High: $5,694 USD|Avg: $3,791 USD|+1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$2,911 USD
Retailer 5$3,240 USD
Retailer 3$3,439 USD
Retailer 1$3,465 USD
Retailer 6$3,610 USD
Retailer 7$3,616 USD
Retailer 2$4,112 USD
Retailer 4$5,619 USD

35 data points across 8 retailers

11 retailers$3,240 USD to $5,619 USD

A
Cheapest Retailer
-
$3,240 USD
Retailer 2
-
$3,369 USD
View
Price last confirmed 36 days ago
A
Retailer 3
-
$3,439 USD
View
A
Retailer 4
-
$3,465 USD
View
Retailer 5
-
$3,499 USD
View
Price last confirmed 38 days ago
Retailer 6
-
$3,610 USD
View
Price last confirmed 11 days ago
Retailer 7
-
$3,616 USD
View
Price last confirmed 34 days ago
Retailer 8
-
$3,888 USD
View
Price last confirmed 38 days ago
B+
Retailer 9
-
$4,112 USD
View
B
Retailer 10
-
$5,619 USD
View
Most Expensive
NZ Jewellers
d46d6bf8-ab55-442a-b520-0a66a8d004ea · Sep 28
$5,870 USD
View
Price last confirmed 39 days ago
10 more retailers have this diamond
Prices start from $3,240 USDSave up to $2,379 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
$3,240 USD