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0.81ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6561251999

Certificate GIA 6561251999

Diamond specifications and retailer prices

From $725 USD
As of November 4, 2026
Save $433 USD (37%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,158 USD 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 $725 to $1,158, a $433 spread on the same certified stone. Frank Darling lists it at $1,158. 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
Color
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: $1,158 USD|Low: $718 USD|High: $1,248 USD|Avg: $943 USD|-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$725 USD
Retailer 5$726 USD
Retailer 11$740 USD
Retailer 9$757 USD
Retailer 2$815 USD
Retailer 10$874 USD
Retailer 8$961 USD
Retailer 6$984 USD
Retailer 4$987 USD
Retailer 3$1,110 USD
Frank Darling$1,158 USD

43 data points across 11 retailers

11 retailers$725 USD to $1,158 USD

A
Cheapest Retailer
-
$725 USD
A
Retailer 2
-
$726 USD
View
A
Retailer 3
-
$740 USD
View
A
Retailer 4
-
$757 USD
View
A
Retailer 5
-
$815 USD
View
A
Retailer 6
-
$874 USD
View
B+
Retailer 7
-
$961 USD
View
A
Retailer 8
-
$984 USD
View
A
Retailer 9
-
$987 USD
View
B+
Retailer 10
-
$1,110 USD
View
Most Expensive
B+
Frank Darling
2688565HK · Nov 6
$1,158 USD
View
10 more retailers have this diamond
Prices start from $725 USDSave up to $433 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
0.81ct Round
$725 USD