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单词 calcedony
例句 calcedony
That peculiar kind of glass usually called schmelz, an imperfect imitation of calcedony, was also made at Venice in the 15th century. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z
The chert has sometimes the appearance of calcedony, and is finely striped. Narrative of a Second Expedition to the Shores of the Polar Sea
In many of them, "quartz, calcedony, red ochre, gypsum, and salts are found." Rambles in the Mammoth Cave, during the Year 1844 By a Visiter
Having sufficiently examined these beautiful varieties of calcedony, the visitor should pass at once to the northern range of tables. How to See the British Museum in Four Visits
Those nodular bodies or figured parts which are here inclosed in the rock, are evidently what may be called calcedony agates. Theory of the Earth, Volume 1 (of 4)
The floor of the cavern was covered with heaps of water-worn fragments of quartzose rock, containing copper pyrites, in some of which the cavities were covered by a deposit of greenish calcedony. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 1
These concretions have a straight cleavage in the direction of their short axis, and are often coated by fibrous calc-sinter and calcedony. Narrative of a Second Expedition to the Shores of the Polar Sea
The floor of the cavern was covered with heaps of water-worn fragments of quartzoze rock containing copper pyrites, in some of which the cavities were covered by a deposit of greenish calcedony. The History of Australian Exploration from 1788 to 1888
These appearances are thought to be observed in the calcedony and ferruginous concretions, which has led some mineralists to conclude, that those concretions had been formed in the same manner, by means of water. Theory of the Earth, Volume 1 (of 4)
These are certain concretions of calcedony, and also of iron-ore, which are thought to have such resemblance to stalactical concretions as, by some superficial observers, to be reckoned of the same kind. Theory of the Earth, Volume 1 (of 4)
I have good reason to believe that water contained within a solid flint will not make its escape, as does that contained in the anhydrites of Mount Berico, which are composed of a porous calcedony. Theory of the Earth, Volume 1 (of 4)
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