Fort Worth daily gazette. (Fort Worth, Tex.) 1882-1891, 1889-09-16

other foreign bodies, lodging within the
she'll, produce an irritation of the tissue
which causes the deposit of peariy |
matter around them for the oyster S pro-
lection This matter is deposited layer |
after layer until the pearl is formed. by |
the artificial introduction of finty partl-
Giles pearls can be made to grow. Inc
Chinese in this way compel certain
kind Of fresh water mussel to produce
pearls in great numbers, though OF small
size. Sometimes they introduce d1mlnu-
tive images of their gods and other
things within the shells and have them
turned into pearl by sort OF OYSTER
plate process.
INVITATIONS OF DIAMONDS.
az suppose that the diamond is more
largely initiated than any other stone!
ssProbabIy. Most of the limitations
scarcely resemble real diamonds closely
enough to deceive any one, but the hner
sorts of counterfets, made IN france
from various compositions, arsasos won
derfuIly like as occasionally to- CHEAT the
expert's eye and no Ordinary isperson
could possibly tell that they were raise ID
a ball room. The most dangegps imlta-
| tions of the diamond, howeversSare KNOWN
! as 'doublets, the manEtaeanre orF
! which is exceedingly ancisnt. "a EthIn
! =
| q little color as possible asaiz4t prociIFss
! Then q bit of crystal IS taken and covered
with a Transparent glue in when
| is mixed the cOlOTing matter
necessary to initiate. the finest
| enecimen Upon this basis Is
| snperimposed the cheap diamond make
| and the Joining so 'artfullY cancealed that
| frequently the most practlced laplaarles
are taken in by the fraud. Doublets are
| sometimes so artistcally made that noth-
ing but the test of specific gravity VIII
show them to be false. Frequently
cInster of diamonds will contain several
doublets, and in necklaces are often
fouud 20 per cent. of such questionable
stones. Thus you see that to buy dla-'
monds from irresponsible persons,
especially at a low price, is the worst
possible folly, since the chances are
enormous that you are cheated. The
value of diamond, too, depends upon
such q number of conditions, OF Whlch
only an experienced student Of precious
stones is able to judge.
TESTING DIAMONDS.
''The method employed for determlu-
ing the genuineneSs of diamonds at the
Rrazilian mines is to rub them with black
mastic, which will adhere II the gem Is
real Or it may be rubbed against an
by the resulting sound. The best OF all
tests. though, is that of Tefraction. IN
like all other crystals, the diamond mas
not q double retracting power, whlch
means that objects looked at through II
do not appear as if multiplied by two. IL
Won have diamond of which yon are
doubtful look at a pin through it. If
YOU see two pins the stone is false.
= diamonds do not fuctuate much IN
value, presumed suggested the Star
: reporter.
'sNo," responded the dealer. Blu
they steadily advance in price. Inc
= demand for them seems continually L
q grow. end the cost of digging for TIT
gems increases with the depth of the eX
cayations in the diamond bearing blue
CLAW Of South Africa and Brazil. Moth
ing short of the discovery of new ant
prolific, fields could bring them down Il
;, the market The African diamond
mines were found by some children OF
moor Boer family who brought to thel
~ mother one evening" dozen shln
n ing pebbles they had picked up
IF which were afterward sold by tn
10 good woman for an average OF S22U
!, apiece. In Brazil the mines ar
20 largely worked, if not wholly, by slaves
~ and have heard that if a man finds
~ really valuable gem he is often given h
10 freedom as a reward. The biggest an
, purest diamond in the world was foun
40 in South Africa in 1884, and weighed OF
1r iginally 400 carats. 1t was reduced .
q the process of cutting to
81 carats, one fragment chippe
m off being bought by the king
al Portugal for $40 900. The Rajah OF Ma
a. tan's famous diamond, until recent
" the largest known in the world, welghs
~ 367 carats, and the Mogul gem 279 cal
,ir ats, in their rough state, so that the OF
+ from the cape easily holds first place.