Among the beautiful productions of nature, rock-crystal may be classed, known as the false topaz when yellow, the morion when black, and the smoky quartz when brown. The colourless kinds are often called Bristol or Irish diamonds, and the violet the amethyst. Some few years ago, a party of tourists, led by a guide, Peter Sulzer, set out from Guttannew, in Switzerland. When descending the mountain they reached a dark cavity, out of which they extracted some pieces of black rock-crystal with the handles of their Alpine stocks. The following year, Sulzer and his son, with a few companions, made an attempt to force their way into the cave, by widening the entrance with gunpowder. In spite of hail, rain, and bitter cold, they persevered, remaining during the night close to the cavern, in order to renew their labours the next morning. Having widened the entrance, they penetrated to a considerable depth into the mountain, through a large cave piled up with debris, in which were embedded large planes of jet-black morions. These beautiful crystals had grown originally from the sides or roof, and had either fallen from their own weight, or been shaken out by some convulsion of nature. Their toil was rewarded by upwards of a thousand large crystals, varying from fifty pounds to more than three hundredweight. Their expedition and its result becoming known, the whole population of Guttannew turned out with hammers, spades, and baskets, to carry off what they had left. As it was reported that the Government intended to interfere, they laboured night and day for a week, until, by the time the authorities arrived from Ijri, the whole had been removed. Some of the finest specimens are still to be seen in the museum at Berne. Amber, about which all sorts of fabulous stories have passed current, is found more frequently in the depths of the sea than in those of the earth. There can be no doubt that it is the product of several conifers, or cone-bearing trees, overwhelmed by the waves. Although the gum which exuded from them has remained concealed for ages, until washed up from the bottom of the ocean, flies and spiders, which must have been caught when it was in a semi-fluid state, have been found embedded in it. The insects now appear as perfect as they were thousands of years ago. The naturalist, Dr Berndt, has discovered 800 different species of insects in amber.