By Purity of Purest Sample (120)

Here are the elements sorted in order of the purity of the most pure sample of each. In some cases the purity is accurately known, either from the original supplier in case of samples from chemical companies, or because I've had it measured. But in many cases it's not much more than an educated guess. For the small number of salts and other compounds, I've been pretty sloppy in estimating the percentage of the element in the compound: It could of course easily be calculated based on the chemical formula and atomic weights.
I currently have a total of 2379 samples representing 118 different elements.

Click any element tile below to get the full entry for that element, or click on the sample picture to go directly to the description of that sample.

Text and images Copyright (c) 2010 by Theodore W. Gray.
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Cerium
Cerium Poster sample
(99.4%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 20 December, 2002
Text Updated: 4 May, 2007
Price: Donated
Size: 0.5"
Purity: 99.4%
Fluorine
Fluorine Real visible fluorine
(99%)

Source: Greg P
Contributor: Greg P
Acquired: 18 April, 2003
Text Updated: 20 November, 2008
Price: Donated
Size: 7"
Purity: >99%
Polonium
Polonium Foil
(99%)

Source: Greg P
Contributor: Greg P
Acquired: 18 April, 2003
Price: Donated
Size: 0.1"
Purity: 99%
Americium
Americium Intact smoke detector
(90%)

Source: Hardware Store
Contributor: Theodore Gray
Acquired: 18 August, 2002
Price: $10/smoke detector
Size: 1.25"
Purity: >90%
Radon
Radon Sample from the RGB Set
(2%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 25 January, 2003
Text Updated: 11 August, 2007
Price: Donated
Size: 0.2"
Purity: <2%
Radium
Radium The Hammer Radium Spinthariscope
(1%)

Source: eBay seller watsgotslots
Contributor: Theodore Gray
Acquired: 19 May, 2007
Text Updated: 19 May, 2007
Price: $86
Size: 1.25"
Purity: <1%
Sample Group: Spinthariscopes
Neptunium
Neptunium Smoke detector element
(1%)

Source: Hardware Store
Contributor: Theodore Gray
Acquired: 20 September, 2007
Text Updated: 21 September, 2007
Price: $10/smoke detector
Size: 0.075"
Purity: <1%
Plutonium
Plutonium Natural plutonium-containing mineral
(1%)

Source: eBay seller rubbleshop
Contributor: eBay seller rubbleshop
Acquired: 19 October, 2002
Text Updated: 29 January, 2009
Price: Donated
Size: 0.1"
Purity: <1%
Francium
Francium Sample from the RGB Set
(0.2%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 25 January, 2003
Text Updated: 11 August, 2007
Price: Donated
Size: 0.2"
Purity: <0.2%
Actinium
Actinium Sample from the RGB Set
(0.2%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 25 January, 2003
Text Updated: 11 August, 2007
Price: Donated
Size: 0.2"
Purity: <0.2%
Protactinium
Protactinium Sample from the RGB Set
(0.2%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 25 January, 2003
Text Updated: 11 August, 2007
Price: Donated
Size: 0.2"
Purity: <0.2%
Technetium
Technetium Technetium plated copper
(0.1%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 29 April, 2009
Text Updated: 30 April, 2009
Price: Donated
Size: 0.25"
Purity: <0.1%
Astatine
Astatine Uranium ore inside a Revigator
(0.1%)

Source: eBay seller bettyboop
Contributor: Theodore Gray
Acquired: 13 November, 2002
Text Updated: 11 March, 2007
Price: $90
Size: 12"
Purity: <0.1%
Curium
Curium Marie Curie commemorative medal
(0%)

Source: eBay seller mrherola
Contributor: Theodore Gray
Acquired: 23 December, 2007
Text Updated: 23 December, 2007
Price: $40
Size: 2.75"
Purity: 0%
Berkelium
Berkelium Poster sample
(0%)

Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 15 April, 2006
Text Updated: 4 May, 2007
Price: Donated
Size: 6"
Purity: 0%
Californium
Californium Poster sample
(0%)

Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 15 April, 2006
Text Updated: 4 May, 2007
Price: Donated
Size: 6"
Purity: 0%
Einsteinium
Einsteinium Poster sample
(0%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 15 April, 2006
Text Updated: 4 May, 2007
Price: Donated
Size: 6"
Purity: 0%
Fermium
Fermium Poster sample
(0%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 15 April, 2006
Text Updated: 4 May, 2007
Price: Donated
Size: 6"
Purity: 0%
Mendelevium
Mendelevium Poster sample
(0%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 15 April, 2006
Text Updated: 4 May, 2007
Price: Donated
Size: 6"
Purity: 0%
Nobelium
Nobelium Poster sample
(0%)

Source: Max Whitby of RGB
Contributor: Max Whitby of RGB
Acquired: 15 April, 2006
Text Updated: 4 May, 2007
Price: Donated
Size: 6"
Purity: 0%
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