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Round|Natural|GIA

1.55ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1539355495

Certificate GIA 1539355495

Diamond specifications and retailer prices

From $6,963 AUD
As of November 4, 2026
Save $3,705 AUD (35%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,667 AUD at Cape Diamonds · As of November 5, 2026
View at Cape Diamonds

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 1539355495. Listed at 12 retailers as of November 4, 2026, with prices from $6,963 to $10,667, a $3,705 spread on the same certified stone. Cape Diamonds lists it at $10,667. 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1539355495
Dimensions7.41 × 7.36 × 4.58 mm
L/W Ratio1.01
Cert comments
Additional clouds, pinpoints and surface graining are not shown.
Key to symbols
Crystal, Cloud, Feather
Top View
7.41 mm7.36 mm1.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1539355495
Side View
Table 58.0%Crown 35°Girdle: MED-THKPavilion 40.8°Culet: NoneDepth 62.0%

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: $10,667 AUD|Low: $6,963 AUD|High: $11,056 AUD|Avg: $8,696 AUD|-3.3%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 3$6,963 AUD
Retailer 6$7,415 AUD
Retailer 5$8,299 AUD
Retailer 10$8,383 AUD
Retailer 7$8,387 AUD
Retailer 8$8,849 AUD
Retailer 9$8,849 AUD
Retailer 4$8,926 AUD
Retailer 2$8,962 AUD
Retailer 11$9,140 AUD
Cape Diamonds$10,667 AUD

44 data points across 11 retailers

12 retailers$6,963 AUD to $10,667 AUD

Retailer 1
-
$6,388 AUD
Price last confirmed 68 days ago
B+
Retailer 2
-
$6,963 AUD
View
B+
Retailer 3
-
$7,415 AUD
View
B+
Retailer 4
-
$8,299 AUD
View
B+
Retailer 5
-
$8,383 AUD
View
B+
Retailer 6
-
$8,387 AUD
View
B
Retailer 7
-
$8,849 AUD
View
B
Retailer 8
-
$8,849 AUD
View
B
Retailer 9
-
$8,926 AUD
View
B
Retailer 10
-
$8,962 AUD
View
B
Retailer 11
-
$9,140 AUD
View
Most Expensive
B
Cape Diamonds
cert_1539355495 · Nov 5
$10,667 AUD
ZAR 118,408 ZAR
View
11 more retailers have this diamond
Prices start from $6,963 AUDSave up to $3,705 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
$6,963 AUD