Round|Natural|GIA

0.99ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1509368435

Certificate GIA 1509368435

Diamond specifications and retailer prices

From $1,603 USD
As of November 4, 2026
Save $1,132 USD (41%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $2,735 USD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.99ct natural round diamond

This 0.99ct natural round sits in the just-under-one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1509368435. Listed at 5 retailers as of November 4, 2026, with prices from $1,603 to $2,735, a $1,132 spread on the same certified stone. 77 Diamonds lists it at $2,735. 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

0.99
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1509368435
Dimensions6.38 × 6.36 × 3.98 mm
L/W Ratio1.00
Star length45%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Cloud, Needle, Indented Natural
Top View
6.38 mm6.36 mm0.99 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509368435
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 62.5%

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 4
Current: $2,735 USD|Low: $1,603 USD|High: $2,779 USD|Avg: $1,960 USD|-0.2%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5$1,603 USD
Retailer 3$1,732 USD
Retailer 2$1,808 USD
Retailer 4$1,899 USD
77 Diamonds$2,735 USD

35 data points across 5 retailers

5 retailers$1,603 USD to $2,735 USD

B+
Cheapest Retailer
-
$1,603 USD
B+
Retailer 2
-
$1,732 USD
View
B
Retailer 3
-
$1,808 USD
View
B+
Retailer 4
-
$1,899 USD
View
Most Expensive
B
77 Diamonds
RBZQYD7KYFK · Nov 6
$2,735 USD
£2,153 GBP
View
4 more retailers have this diamond
Prices start from $1,603 USDSave up to $1,132 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.

B+
0.99ct Round
$1,603 USD