A number of very elegant specimens of Derbyshire Spar (Fluated Lime) principally pollished on one side to shew the variety. 60 in number. from Matlock Bath

Object Status:

Unlocated

Primary Source Reference:

Peale Museum Accessions Book, Historical Society of Pennsylvania, p. 60

Notes:

Blue John (also known as Derbyshire spar) is a semi-precious mineral, a rare form of fluorite with bands of a purple-blue or yellowish color.

The donor, Anthony Slater, was a Philadelphia merchant.