crystals are found lining cavities of variable size, and in one
instance thirty tons of crystals were found in a single cavity. These
crystals are mined by the farmers in their spare time and sold in the
streets of Hot Springs, their value amounting to some $10,000
annually. Several thousand dollars' worth are cut from quartz into
charms and faceted stones, although ten times that amount of paste or
imitation diamonds are sold as Arkansas crystals.

Rose quartz is found in the granitic veins of Oxford County, Maine,
and in 1887, 1888, and 1889 probably $500 worth of this material was
procured and worked into small spheres, dishes, charms, and other
ornamental objects.

The well-known agatized and jasperized wood of Arizona is so much
richer in color than that obtained from any other known locality that,
since the problem of cutting and polishing the large sections used for
table tops and other ornamental purposes was solved, fully $50,000
worth of the rough material has been gathered and over $100,000 worth
of it has been cut and polished. This wood, which was a very prominent
feature at the Paris Exposition, promises to become one of our richest
ornamental materials.

Chlorastrolite in pebbles is principally found on the inside and
outside shores of Rock Harbor, a harbor about eight miles in length on
the east end of Isle Royale, Lake Superior, where they occur from the
size of a pin head to, rarely, the size of a pigeon's egg. When larger
than a pea they frequently are very poor in form or are hollow in
fact, and unfit for cutting into gems. They are collected in a
desultory manner, and are sold by jewelers of Duluth, Petoskey, and
other cities, principally to visitors. The annual sale ranges from
$200 to $1,000.

Thomsonite in pebbles occurs with the chlorastrolite at Isle Royal,
but finer stones are found on the beach at Grand Marais, Cook County,
Minnesota. Like the chlorastrolites, they result from the weathering
of the amygdaloid rock, in which they occur as small nodules, and in
the same manner are sold by jewelers in the cities bordering on Lake
Superior to the extent of $200 to $1,000 worth annually.

THE DIAMOND CUTTING INDUSTRY.

In New York there are sixteen firms engaged in cutting and recutting
diamonds, and in Massachusetts there are three. Cutting has also been
carried on at times in Pennsylvania and Illinois, but has been
discontinued. The firms that were fully employed were generally the
l