Red Lead is found in Camarines Norte and other places.
Graphite.—In 1891 some pieces of this valuable mineral were shown to me by a native, who said he had found the ore in Mindoro, but he would not say from what locality.
Quicksilver.—I have seen small bottles of this handed round by native disciples of Ananias. But I have never seen a bit of cinnabar or other ore of mercury, and I shall not believe there is any of this metal in the Philippines until I see the ore in situ, or have good testimony to that effect.
Sulphur abounds; there are several places where it can be obtained in large quantities near the volcanoes.
Asbestos.—This curious mineral would not strike a native as being of value.
All I can say about it is that at the Madrid Exhibition of 1887 a specimen of this substance was shown by the Civil Governor of Ilocos Norte as having been found in that province.
Yellow Ochre is found in Batangas, Camarines, Albay, Leyte and Antique, amongst other places.
Kaolín is found in Manila, Batangas and Camarines Sur, and probably in many other places.
Marble of a yellowish colour has been quarried at Montalban. I have used some of it, but found it full of faults, and not very satisfactory.
Plastic Clays for pottery and for making bricks and tiles abound.