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Round|Natural|GIA

5.50ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6505424045

Certificate GIA 6505424045

Diamond specifications and retailer prices

From $97,109 AUD
As of November 6, 2026
Save $33,864 AUD (26%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $130,973 AUD at Yorxs · As of November 5, 2026
View at Yorxs

About this 5.5ct natural round diamond

This 5.5ct natural round sits in the over five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6505424045. Listed at 8 retailers as of November 5, 2026, with prices from $97,109 to $130,973, a $33,864 spread on the same certified stone. Yorxs lists it at $130,973. 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

5.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle32°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6505424045
Dimensions11.39 × 11.46 × 6.81 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Top View
11.39 mm11.46 mm5.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6505424045
Side View
Table 59.0%Crown 32°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 59.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $119,513 AUD|Low: $96,092 AUD|High: $132,470 AUD|Avg: $116,159 AUD|+0.8%
Retailer 1
Retailer 2
Yorxs
November 6, 2026
Retailer 2$97,109 AUD
Retailer 1$119,513 AUD
Yorxs$130,973 AUD

40 data points across 3 retailers

8 retailers$97,109 AUD to $130,973 AUD

B+
Cheapest Retailer
-
$97,109 AUD
B+
Retailer 2
-
$100,764 AUD
View
B+
Retailer 3
-
$101,271 AUD
View
B+
Retailer 4
-
$106,172 AUD
View
B
Retailer 5
-
$117,968 AUD
View
B
Retailer 6
-
$119,513 AUD
View
B
Retailer 7
-
$124,774 AUD
View
Most Expensive
B
Yorxs
57512 · Nov 5
$130,973 AUD
€87,320 EUR
View
7 more retailers have this diamond
Prices start from $97,109 AUDSave up to $33,864 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+
5.50ct Round
$97,109 AUD