'    •;    5G8    MINERALS    OF    NEW-HAMPSHIRE.

I ■ ¹ ‘

j    Mica,    one of the component parts of granite, is rarely found in

^f    transparent    sheets of sufficient size to be of commercial value.

Quarries have been worked at Grafton, Alstead and Acworth,
t j j^;    The two last are exhausted, but the Grafton quarry is still valua-

|    '    hie, yielding twenty-five tons of sheet mica annually. The best

i    quality brings ten dollars per pound. Its elasticity makes it valu-

!    able for lights where glass cannot be used.

Felspar, another of the component parts of granite, is found in
large masses, at times semi-erystalized, at Grafton, Acworth, Al-
i    stead and Manchester. At Grafton and Acworth fine specimens

^r    of albite are found, and at Manchester the flesh-colored variety.

It is used in the manufacture of porcelain and artificial teeth.

Clay Slate quarries have been opened in Littleton, Lebanon,
Dalton, Unity, Piermont and Claremont, but none of them have
yet proved remunerative. The one at Lebanon is extensive,
but too soft and brittle to furnish a good material for roofing or
paving.

Limestone deposits are found in Haverhill, Lisbon, Columbia,
Lyme, Orford and Cornish. At East Haverhill and East Lisbon
^!    lime is manufactured, annually, in sufficient quantities to supply

the vicinity.

Graphite occurs in abundance in Nelson, Goshen, Campton
j    and Antrim. In the first named locality it is ground and sent to

the Boston market.

Of the ornamental minerals found in New-Hampshire, the fol-
:    lowing occur more frequently.

Quartz crystals are found in North Benton and East Campton.
From both of these localities many beautiful specimens have been
obtained for cabinets, but, though not exhausted they are now se-
cured with much more labor than formerly.

Beryl is found in Grafton, Orange, Acworth and New London,
hut good specimens cannot now be obtained without considerable
blasting. The best specimens have been obtained in Grafton and
Acworth.    /

Garnets occur in Lisbon, Warren, Springfield and Hanover.

■    At Lisbon they are found in great quantities in the pastures around

■    Mink pond. At Warren some of the specimens are very rare, and
are of the cinnamon variety. At Springfield they are abundant,
with perfect faces, but of common quality. There are exhausted
localities afjjRorth Haverhill and Amherst.

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