Round|Natural|GIA

0.55ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 1255439370

Certificate GIA 1255439370

Diamond specifications and retailer prices

From $595 USD
As of November 4, 2026
Save $929 USD (61%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,072 USD at NZ Jewellers · As of November 4, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1255439370. Listed at 10 retailers as of November 4, 2026, with a 156% 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
K
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1255439370
Dimensions5.26 × 5.23 × 3.26 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
5.26 mm5.23 mm0.55 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1255439370
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.2%

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 4
Current: $2,072 USD|Low: $595 USD|High: $2,072 USD|Avg: $927 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 3$595 USD
Retailer 8$599 USD
Retailer 6$623 USD
Retailer 7$645 USD
Retailer 10$645 USD
Retailer 9$691 USD
Retailer 2$802 USD
Retailer 5$899 USD
Retailer 4$1,524 USD
NZ Jewellers$2,072 USD

41 data points across 10 retailers

10 retailers$595 USD to $1,524 USD

A
Cheapest Retailer
-
$595 USD
B+
Retailer 2
-
$599 USD
View
B+
Retailer 3
-
$623 USD
View
Retailer 4
-
$645 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$645 USD
View
B+
Retailer 6
-
$691 USD
View
B
Retailer 7
-
$802 USD
View
B
Retailer 8
-
$899 USD
View
B
Retailer 9
-
$1,524 USD
View
Most Expensive
NZ Jewellers
a4a68796-f60c-4280-b19c-15829ead3b87 · Nov 4
$2,072 USD
View
Price under review
9 more retailers have this diamond
Prices start from $595 USDSave up to $929 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
$595 USD