CaratHunter
Plans
Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1509366860

Certificate GIA 1509366860

Diamond specifications and retailer prices

From $11,620 AUD
As of November 6, 2026
Save $4,068 AUD (26%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $15,688 AUD at Yorxs · As of November 2, 2026
View at Yorxs

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 1509366860. Listed at 7 retailers as of November 2, 2026, with prices from $11,620 to $15,688, a $4,068 spread on the same certified stone. Yorxs lists it at $15,688. 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 angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1509366860
Dimensions7.32 × 7.37 × 4.61 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
7.32 mm7.37 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509366860
Side View
Table 59.0%Crown 35°Girdle: Slightly ThickPavilion 41.4°Culet: NoneDepth 62.7%

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: $15,110 AUD|Low: $11,469 AUD|High: $15,757 AUD|Avg: $14,225 AUD|+0.8%
Retailer 1
Retailer 2
Retailer 3
Yorxs
November 6, 2026
Retailer 3$11,620 AUD
Retailer 2$14,590 AUD
Retailer 1$15,110 AUD
Yorxs$15,688 AUD

38 data points across 4 retailers

7 retailers$11,620 AUD to $15,688 AUD

B+
Cheapest Retailer
-
$11,620 AUD
B+
Retailer 2
-
$11,918 AUD
View
B+
Retailer 3
-
$12,662 AUD
View
B
Retailer 4
-
$14,590 AUD
View
Retailer 5
-
$14,590 AUD
View
Price last confirmed 28 days ago
B
Retailer 6
-
$15,110 AUD
View
Most Expensive
B
Yorxs
TIM3124 · Nov 2
$15,688 AUD
€10,266 EUR
View
6 more retailers have this diamond
Prices start from $11,620 AUDSave up to $4,068 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
$11,620 AUD