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The rounded, crystalline flakes that make up the Lichtenberg Figure are actually chains of tiny conchoidal fractures.— Red Ice Creations
The specimens shown to us sufficiently indicated that it was neither alunite, similar to the rock of Tolfa and Piombino, nor those capillary and silky salts of alkaline sulphate of alumina and magnesia that line the clefts and cavities of rocks, but real masses of native alum, with a conchoidal or imperfectly lamellar fracture.— Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3
Its fracture is not fibrous but imperfectly conchoidal.— Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3
This cement, where it abounds, has a conchoidal fracture and passes to jasper.— Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3
It incloses angular and less friable masses of dark brown clay with a slaty and sometimes conchoidal fracture.— Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3

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