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Round|Natural|IGI

0.81ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 660495651

Certificate IGI 660495651

Diamond specifications and retailer prices

From $644 USD
Save $862 USD (57%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $1,506 USD at MOH London
View at MOH London

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 IGI 660495651. Listed at 10 retailers, with prices from $644 to $1,506 at MOH London, a $862 spread on the same certified stone. 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 angle36°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 660495651
Dimensions5.92 × 5.88 × 3.75 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
5.92 mm5.88 mm0.81 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 660495651
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 63.5%

Caratlytics Score

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

Price History

Last verified: Oct 1
Current: $1,506 USD|Low: $645 USD|High: $1,506 USD|Avg: $823 USD|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 1, 2026
Retailer 7$660 USD
Retailer 8$660 USD
Retailer 2$694 USD
Retailer 9$776 USD
Retailer 5$778 USD
Retailer 6$781 USD
Retailer 3$929 USD
Retailer 4$938 USD
MOH London$1,506 USD

35 data points across 9 retailers

10 retailers$644 USD to $1,506 USD

A
Cheapest Retailer
-
$644 USD
A
Retailer 2
-
$660 USD
View
A
Retailer 3
-
$660 USD
View
A
Retailer 4
-
$694 USD
View
A
Retailer 5
-
$776 USD
View
A
Retailer 6
-
$780 USD
£614 GBP
View
A
Retailer 7
-
$781 USD
£615 GBP
View
A
Retailer 8
-
$929 USD
€885 EUR
View
B+
Retailer 9
-
$938 USD
ZAR 15,146 ZAR
View
Most Expensive
B
MOH London
C2672F2D0 · Oct 1
$1,506 USD
£1,186 GBP
View
9 more retailers have this diamond
Prices start from $644 USDSave up to $862 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
$644 USD