Arizona citizen., 1872-08-24
saturday. August 24, 1S72.
THE ARIZONA DIAMONDS.

2 ing, Surveying, Claiming, sc. From The San Francisco Bulletin.7 Henry Janin's report to s. L. M.
 Barlow, gives the following imforma- tion concerning his discoveries and
 aUTE
 He ys while at the diamond fields, there vas washed of rich gravel less than, out say, three thousand pounds, . gr one and half tons. This amount :. # 0 k was done by Messrs. Stack &
 Arnold, principally, the only ex-
 ed washers, assisted at times U ~ self and other member of the party. The total amount of work done was under, but say four days work of two men, or eight days work of one man.
 This amount of labor produced 256 carats of diamonds, first quality, worth $16 per carat, or $4,O96; 56S carats diamonds, second quality, worth $3 per carat, $1,7O4; SPA carats, worth $5.S00 Further of rubies, four pounds, of 7,2O0 carats, worth fifty cents per carat, but estimated at thirty cents $2,226. Total produce of one and a half tons gravel, $S,O26, or $5,35O- say $5.OOO-per ton.
 The estimate was made on a conser- vative, commercial and selling basis, and ignored the fact that while none of the diamonds were worth less, many were large enought to be worth much more per carat than $16. The estimate upon the rubies was made with due regard to the great quantity in which they can be produced and to the effect of this quantity upon the market.
 The washing was done by hand, i'll ordinary gold pans. With the assis- tance of even the simplest machinery (gold rockers), the results of the same quality of gravel would have been increased many fold by the same number of days work. One thousand tons of such gravel as this would pro- duce $50 per share, and would more than cover the purchase price and ex- penses of production. Gravel so poor as to produce in value only one per cent. of the ascertained value of the richest gravel would still be worth $50 per ton, and would pay very large profits, if washed in quantities. The expense of washing would never exceed $1O per ton. An acre of ground covers..43, 56O square feet, and with an average dept of soil of one foot would produce tat twenty cubic feet per ton) over, but say two thousand tons. Therefore, if the ground proves as rich over only one- half acre of ground, as the stuff washed already, this small area will produce 1000 tons, and would more than cover by its yield of dia- monds and rubies the purchase money. If ten acres only, which would furnish 10000 tons, prove to be one- twentieth five per cent, as rich as the best ground, the produce will amount to $5,000,OO0, or $50 per share.
 Our stay at the diamond fields was so short i've were in camp at the field only seven days) and there was so much to be done in the way of locat- ing, surveying and securing the prop erty, water rights and timber lands, that it left much less time than I de- sired in which to prospect and sample this tract of ground. To prospect the whole tract of nearly 5000 acres would occupy months. 1 had only | time to gather samples from those portions of the 260-acre block of ground which are marked on the ac- companying plat. At each one of the points numbered, diamonds or rubies were found, as per enclosed samples. The points were over one-third of @ mile distant from the original dis covery, and, show very large area to be diamond and ruby bearing.
 The samples were taken from the surface. It is probable that at a greater depth larger diamonds would be found. The amount of prospect ing done was insignificant, and does not enable me to form judgment as to the extent or limit either of the very rich or only moderately rich ground.
 The apprehension that diamonds may be found in such an abundance as to destroy their value, is to my mind entirely without foundation. The question of water is satisfactorily answara6 bv tho statement that we