This stone, of a fine reddish-yellow colour, is distinguished as either Oriental or Western.
Oriental is much more esteemed, and chiefly for its colour and
hardness. It scratches quartz, but is scratched by corundum ; for which
reason it cannot be mistaken for it, although some people have
It comes from Pegu, Ceylon, and Arabia. It is very bright and receives a fine polish, although its light is rather resinous.
crystallizes in oblong tetrahedral prisms, terminating in two short
pyramids ; has double refraction, and its specific gravity is from 3-631 to 3-687.
The Western jacinth is, on the contrary, a very common yellow quartz, which is found in Brazil and in France.
In colour it is more yellowish than the Oriental. On analysis it yields