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Round|Natural|GIA

0.81ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6561251999

Certificate GIA 6561251999

Diamond specifications and retailer prices

From $1,036 AUD
As of November 4, 2026
Save $618 AUD (37%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,654 AUD at Frank Darling · As of November 6, 2026
View at Frank Darling

About this 0.81ct natural round diamond

This 0.81ct natural round sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6561251999. Listed at 11 retailers as of November 4, 2026, with prices from $1,036 to $1,654, a $618 spread on the same certified stone. Frank Darling lists it at $1,654. 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

0.81
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6561251999
Dimensions5.93 × 5.95 × 3.72 mm
L/W Ratio1.00
Culet sizeNone
Top View
5.93 mm5.95 mm0.81 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6561251999
Side View
Table 58.0%Crown 36.5°Girdle: MED-STKPavilion 41°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 4
Current: $1,654 AUD|Low: $1,026 AUD|High: $1,782 AUD|Avg: $1,348 AUD|-7.2%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 7$1,036 AUD
Retailer 5$1,037 AUD
Retailer 11$1,057 AUD
Retailer 9$1,081 AUD
Retailer 2$1,164 AUD
Retailer 10$1,249 AUD
Retailer 8$1,373 AUD
Retailer 6$1,406 AUD
Retailer 4$1,410 AUD
Retailer 3$1,586 AUD
Frank Darling$1,654 AUD

43 data points across 11 retailers

11 retailers$1,036 AUD to $1,654 AUD

A
Cheapest Retailer
-
$1,036 AUD
A
Retailer 2
-
$1,037 AUD
View
A
Retailer 3
-
$1,057 AUD
View
A
Retailer 4
-
$1,081 AUD
View
A
Retailer 5
-
$1,164 AUD
View
A
Retailer 6
-
$1,249 AUD
View
B+
Retailer 7
-
$1,373 AUD
View
A
Retailer 8
-
$1,406 AUD
View
A
Retailer 9
-
$1,410 AUD
View
B+
Retailer 10
-
$1,586 AUD
View
Most Expensive
B+
Frank Darling
2688565HK · Nov 6
$1,654 AUD
$1,158 USD
View
10 more retailers have this diamond
Prices start from $1,036 AUDSave up to $618 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
0.81ct Round
$1,036 AUD