Round|Natural|GIA

0.55ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6551409149

Certificate GIA 6551409149

Diamond specifications and retailer prices

From $607 USD
As of November 2, 2026
Save $832 USD (58%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $2,463 USD 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 26 retailers as of November 2, 2026, with a 137% 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
Color
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 2
Current: $940 USD|Low: $552 USD|High: $1,457 USD|Avg: $997 USD|+5.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 3, 2026
Retailer 7$607 USD
Retailer 9$748 USD
Retailer 6$890 USD
Retailer 1$940 USD
Retailer 3$1,015 USD
Retailer 2$1,016 USD
Retailer 8$1,181 USD
Retailer 5$1,213 USD
Retailer 4$1,439 USD

43 data points across 9 retailers

26 retailers$607 USD to $1,439 USD

A
Cheapest Retailer
-
$607 USD
Final sale: no returns
A
Retailer 2
-
$653 USD
View
Retailer 3
-
$699 USD
View
Price last confirmed 22 days ago
Retailer 4
-
$712 USD
View
Price last confirmed 63 days ago
Retailer 5
-
$712 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$721 USD
View
B+
Retailer 7
-
$732 USD
A$1,127 AUD
View
B+
Retailer 8
-
$739 USD
View
B+
Retailer 9
-
$748 USD
View
B+
Retailer 10
-
$819 USD
View
Retailer 11
-
$821 USD
View
Price last confirmed 42 days ago
B+
Retailer 12
-
$876 USD
View
B+
Retailer 13
-
$880 USD
View
B+
Retailer 14
-
$880 USD
View
B+
Retailer 15
-
$890 USD
View
B+
Retailer 16
-
$910 USD
View
B
Retailer 17
-
$940 USD
£740 GBP
View
B
Retailer 18
-
$961 USD
View
B+
Retailer 19
-
$1,015 USD
€967 EUR
View
B+
Retailer 20
-
$1,016 USD
£800 GBP
View
Retailer 21
-
$1,101 USD
View
Price last confirmed 7 days ago
Retailer 22
-
$1,181 USD
A$1,817 AUD
View
Price last confirmed 30 days ago
B
Retailer 23
-
$1,213 USD
ZAR 19,589 ZAR
View
B
Retailer 24
-
$1,261 USD
CA$1,751 CAD
View
B
Retailer 25
-
$1,439 USD
£1,133 GBP
View
Most Expensive
NZ Jewellers
9b4a09a1-bca8-48c8-abbe-fa20ccd6310f · Oct 17
$2,463 USD
View
Price under review
25 more retailers have this diamond
Prices start from $607 USDSave up to $832 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.

A
0.55ct Round
$607 USD