Henwoodite
Encyclopedia
Rashleighite, also called Henwoodite is a ferrian variety of turquoise
. The names are in honour of the Cornish
geologists Philip Rashleigh
and William Jory Henwood.
Turquoise
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula CuAl648·4. It is rare and valuable in finer grades and has been prized as a gem and ornamental stone for thousands of years owing to its unique hue...
. The names are in honour of the Cornish
Cornwall
Cornwall is a unitary authority and ceremonial county of England, within the United Kingdom. It is bordered to the north and west by the Celtic Sea, to the south by the English Channel, and to the east by the county of Devon, over the River Tamar. Cornwall has a population of , and covers an area of...
geologists Philip Rashleigh
Philip Rashleigh
Philip Rashleigh FRS , antiquary and Cornish squire, eldest son of Jonathan Rashleigh, M.P. for Fowey in Cornwall , who married, on 11 June 1728, Mary, daughter of Sir William Clayton of Marden in Surrey, was born at Aldermanbury, London, 28 Dec.1729...
and William Jory Henwood.