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Round|Natural|GIA

0.55ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6551409149

Certificate GIA 6551409149

Diamond specifications and retailer prices

From $883 AUD
As of November 6, 2026
Save $1,199 AUD (58%) vs most expensive(unlock to see where)
31 retailers carry this diamond
Most expensive: $3,585 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 0.55ct natural round diamond

This 0.55ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6551409149. Listed at 31 retailers as of November 6, 2026, with a 136% 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

0.55
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6551409149
Dimensions5.21 × 5.24 × 3.27 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Crystal
Top View
5.21 mm5.24 mm0.55 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551409149
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,375 AUD|Low: $883 AUD|High: $2,119 AUD|Avg: $1,476 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 7, 2026
Retailer 4$883 AUD
Retailer 14$982 AUD
Retailer 6$1,089 AUD
Retailer 7$1,291 AUD
Retailer 3$1,295 AUD
Retailer 11$1,317 AUD
Retailer 13$1,354 AUD
Retailer 1$1,375 AUD
Retailer 8$1,474 AUD
Retailer 10$1,480 AUD
Retailer 9$1,589 AUD
Retailer 5$1,719 AUD
Retailer 2$1,764 AUD
Retailer 12$2,083 AUD

44 data points across 14 retailers

31 retailers$883 AUD to $2,083 AUD

A
Cheapest Retailer
-
$883 AUD
Final sale: no returns
A
Retailer 2
-
$950 AUD
View
A
Retailer 3
-
$982 AUD
View
Retailer 4
-
$1,017 AUD
View
Price last confirmed 27 days ago
Retailer 5
-
$1,036 AUD
View
Price last confirmed 68 days ago
A
Retailer 6
-
$1,036 AUD
View
B+
Retailer 7
-
$1,049 AUD
View
B+
Retailer 8
-
$1,065 AUD
View
B+
Retailer 9
-
$1,076 AUD
View
B+
Retailer 10
-
$1,089 AUD
View
B+
Retailer 11
-
$1,192 AUD
View
Retailer 12
-
$1,195 AUD
View
Price last confirmed 46 days ago
B+
Retailer 13
-
$1,275 AUD
View
B+
Retailer 14
-
$1,281 AUD
View
B+
Retailer 15
-
$1,281 AUD
View
B+
Retailer 16
-
$1,291 AUD
View
B+
Retailer 17
-
$1,295 AUD
View
B+
Retailer 18
-
$1,317 AUD
View
B+
Retailer 19
-
$1,324 AUD
View
B+
Retailer 20
-
$1,354 AUD
View
B+
Retailer 21
-
$1,375 AUD
View
B
Retailer 22
-
$1,399 AUD
View
B+
Retailer 23
-
$1,474 AUD
View
B+
Retailer 24
-
$1,480 AUD
View
B
Retailer 25
-
$1,589 AUD
View
B
Retailer 26
-
$1,602 AUD
View
Retailer 27
-
$1,719 AUD
View
Price last confirmed 34 days ago
B
Retailer 28
-
$1,764 AUD
View
B
Retailer 29
-
$1,835 AUD
View
B
Retailer 30
-
$2,083 AUD
View
Most Expensive
NZ Jewellers
9b4a09a1-bca8-48c8-abbe-fa20ccd6310f · Oct 17
$3,585 AUD
$2,463 USD
View
Price under review
30 more retailers have this diamond
Prices start from $883 AUDSave up to $1,199 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.

A
0.55ct Round
$883 AUD