15 April, 2004 (2)

15 April, 2004

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.
Boron
Boron Boron Nitride ceramic disk

Boron Nitride ceramic disk.
Source: John Wechselberger
Contributor: John Wechselberger
Acquired: 15 April, 2004
Price: Donated
Size: 4.5"
Purity: <50%
Carbon
Carbon Hand-made pencils

Hand-made pencils.
Source: Theodore Gray
Contributor: Theodore Gray
Acquired: 15 April, 2004
Price: Donated
Size: 7"
Purity: >95%