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1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6531188321

Certificate GIA 6531188321

Diamond specifications and retailer prices

From $10,547 AUD
As of November 6, 2026
Save $13,247 AUD (56%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: $23,794 AUD at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6531188321. Listed at 28 retailers as of November 5, 2026, with prices from $10,547 to $23,794, a $13,247 spread on the same certified stone. NZ Jewellers lists it at $23,794. 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
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6531188321
Dimensions7.36 × 7.34 × 4.56 mm
L/W Ratio1.00
Top View
7.36 mm7.34 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531188321
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.1%

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 6
Current: $13,065 AUD|Low: $10,547 AUD|High: $20,066 AUD|Avg: $14,385 AUD|-0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9$10,547 AUD
Retailer 6$10,879 AUD
Retailer 4$11,138 AUD
Retailer 8$11,415 AUD
Retailer 1$13,065 AUD
Retailer 7$13,144 AUD
Retailer 3$14,659 AUD
Retailer 2$17,356 AUD
Retailer 5$19,773 AUD

44 data points across 9 retailers

28 retailers$10,547 AUD to $23,794 AUD

B+
Cheapest Retailer
-
$10,547 AUD
B+
Retailer 2
-
$10,787 AUD
View
B+
Retailer 3
-
$10,879 AUD
View
B+
Retailer 4
-
$11,113 AUD
View
B+
Retailer 5
-
$11,138 AUD
View
B+
Retailer 6
-
$11,415 AUD
View
Final sale: no returns
B+
Retailer 7
-
$11,458 AUD
View
B+
Retailer 8
-
$11,691 AUD
View
B+
Retailer 9
-
$11,840 AUD
View
Retailer 10
-
$11,896 AUD
View
Price last confirmed 8 days ago
B
Retailer 11
-
$12,679 AUD
View
B
Retailer 12
-
$12,889 AUD
View
B+
Retailer 13
-
$13,065 AUD
View
B
Retailer 14
-
$13,087 AUD
View
Retailer 15
-
$13,144 AUD
View
Price last confirmed 14 days ago
B
Retailer 16
-
$13,203 AUD
View
B
Retailer 17
-
$13,675 AUD
View
B
Retailer 18
-
$14,103 AUD
View
B
Retailer 19
-
$14,103 AUD
View
B
Retailer 20
-
$14,420 AUD
View
B
Retailer 21
-
$14,569 AUD
View
B
Retailer 22
-
$14,659 AUD
View
B
Retailer 23
-
$14,871 AUD
View
B
Retailer 24
-
$15,186 AUD
View
Retailer 25
-
$15,662 AUD
View
Price last confirmed 14 days ago
B
Retailer 26
-
$17,356 AUD
View
B
Retailer 27
-
$19,773 AUD
View
Most Expensive
B
NZ Jewellers
bad8d0d6-c1c9-4c6b-977e-f24c51c588e1 · Nov 5
$23,794 AUD
$16,349 USD
View
27 more retailers have this diamond
Prices start from $10,547 AUDSave up to $13,247 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
$10,547 AUD