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Updated: June 15, 2025
The hill immediately over our camp was Bullabalakit, and consisted partly of granular felspar, probably tinged greenish with chlorite; and partly of concretionary porphyry, the concretions being mottled red and white, and containing grains of quartz and crystals of common felspar; the white concretions resisting the action of the atmosphere stood in relief on the weather surface; I noticed also a vein of amethystine quartz.
One of these was about a mile to the east of our camp and consisted of hardish sandstone, composed of grains of quartz, without any apparent cement, but containing a small quantity of decomposed felspar. At the base of those hills I found, as elsewhere, pebbles consisting chiefly of a splintery quartz rock, in which the grains of sand or quartz were firmly embedded in a siliceous cement.
Below the eight-inch magnets the dust is blown out of the particles mechanically, and they then go to the four-inch magnets for final cleansing and separation.... Obviously, at each step the percentage of felspar and phosphorus is less and less until in the final concentrates the percentage of iron oxide is 91 to 93 per cent.
The walk takes us into the true serpentine region; at Coverack serpentine is largely blent with felspar and crystal. Perhaps in the future these sands of Kennack will be thronged by thousands of holiday-makers, but they are better as they are, haunted by seabirds and washed by tides of ever-varying aspect.
Roper observed a rugged country to the northward, and a fine high range to the south-east. The whole country from the large flat to our camp, was composed of felspathic porphyry, containing crystals of felspar, and accidentally of quartz, in a paste varying in colour and hardness.
I shall endeavour to turn your advice to some account; and, in the meantime, you need give yourself no farther trouble about the letting of the farms. Yours, P. FELSPAR. "P.S. You may assure the tenants that neither of them will suffer injustice at my hands." Things now appeared favourable; but, as Mr.
If, then, a quantity of felspar in small fragments is thrown into the mixture, and the whole then submitted to the jigging process, the result will be that the stone will collect on the top, and the coal at the bottom, with a layer of felspar separating the two.
The porphyry, which is of warm brown or chocolate colour, includes many crystals of lighter coloured felspar, and dark crystals of hornblende. The stone would take a very high polish, and for decorative purposes of high class, such as vases, panels and bases for busts and tazzas, etc., it is unequalled in South India, and deserving of all attention.
At Royalston we observed them to spring seemingly from the felspar and project into smoky quartz, becoming more transparent as they advanced into the harder stone. The only perceptible difference in the two stones is in the color.
There were also pebbles of a quartzose conglomerate, and others of decomposed porphyry, the base consisting of granular felspar, with crystals of common felspar. It is not improbable that good millstones might be obtained from the range of Nundewar. The grass was fortunately much better here than at the last camp. February 20.
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