Round|Natural|IGI

0.55ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 815638123

Shape and cutting style on the report: Round brilliant

Certificate IGI 815638123

Diamond specifications and retailer prices

From $445 USD
As of October 28, 2026
Save $1,261 USD (74%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,706 USD at NZ Jewellers · As of October 30, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 815638123. Listed at 8 retailers as of October 28, 2026, with prices from $445 to $1,706, a $1,261 spread on the same certified stone. NZ Jewellers lists it at $1,706. 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
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 815638123
Dimensions5.31 × 5.34 × 3.21 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
5.31 mm5.34 mm0.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 815638123
Side View
Table 60.0%Crown 32.8°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 60.3%

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: Oct 28
Current: $1,706 USD|Low: $445 USD|High: $1,706 USD|Avg: $759 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 5$445 USD
Retailer 4$479 USD
Retailer 2$578 USD
Retailer 8$586 USD
Retailer 9$654 USD
Retailer 7$655 USD
Retailer 6$664 USD
Retailer 3$1,029 USD
NZ Jewellers$1,706 USD

27 data points across 9 retailers

8 retailers$445 USD to $1,706 USD

A
Cheapest Retailer
-
$445 USD
A
Retailer 2
-
$479 USD
View
B+
Retailer 3
-
$578 USD
£455 GBP
View
B+
Retailer 4
-
$586 USD
View
B+
Retailer 5
-
$654 USD
View
B+
Retailer 6
-
$655 USD
View
Retailer 7
-
$1,029 USD
£810 GBP
View
Price last confirmed 8 days ago
Most Expensive
B
NZ Jewellers
acccbea3-923f-4cf0-bcdc-3f6ec6a8bf14 · Oct 30
$1,706 USD
View
7 more retailers have this diamond
Prices start from $445 USDSave up to $1,261 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
$445 USD