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Round|Natural|GIA

0.81ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6555631191

Certificate GIA 6555631191

Diamond specifications and retailer prices

From $1,045 USD
8 retailers carry this diamond
Most expensive: $1,359 USD at Cape Diamonds
View at Cape Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6555631191. Listed at 8 retailers. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6555631191
Dimensions5.91 × 5.95 × 3.70 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.91 mm5.95 mm0.81 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555631191
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 1
Current: $1,359 USD|Low: $559 USD|High: $1,365 USD|Avg: $1,059 USD
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
September 7, 2026
Retailer 4$559 USD
Retailer 12$838 USD
Retailer 6$914 USD
Retailer 7$917 USD
Retailer 11$929 USD
Retailer 14$935 USD
Retailer 3$1,045 USD
Retailer 2$1,052 USD
Retailer 9$1,162 USD
Retailer 8$1,177 USD
Retailer 10$1,252 USD
Retailer 5$1,324 USD
Cape Diamonds$1,359 USD
Retailer 13$1,365 USD

18 data points across 14 retailers

8 retailers

A
Retailer 1
-
$838 USD
Price last confirmed 26 days ago
A
Retailer 2
-
$917 USD
£722 GBP
View
Price last confirmed 24 days ago
A
Retailer 3
-
$935 USD
View
Price last confirmed 23 days ago
B+
Retailer 4
-
$1,045 USD
View
A
Retailer 5
-
$1,052 USD
View
Price last confirmed 24 days ago
B+
Retailer 6
-
$1,177 USD
€1,121 EUR
View
Price last confirmed 28 days ago
B+
Retailer 7
-
$1,252 USD
View
Price last confirmed 54 days ago
Most Expensive
B
Cape Diamonds
cert_6555631191 · Aug 7
$1,359 USD
ZAR 21,954 ZAR
View
Price last confirmed 55 days ago
7 more retailers have this diamond
Prices start from $1,045 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.

A
0.81ct Round
$1,045 USD