American Pearls
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In our eReader you can find the full English version of the book. Read American Pearls Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book American Pearls
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The mantle is the part of the mussel that creates the pearl. In secreting the material that builds the shell, it occasionally happens that concretions of these materials are formed apart from the shell. These are pearls. When these occur they may be composed en- tirely of the substance of any one layer of the shell, or of all the layers of which the shell is composed.
Concretions of conchioline, the substance of the outer strata, occur, though rarely. They are usually of a dark brown color, oft...en quite transparent, but they have little commercial value. Concretions of the sub- stance of the second strata of the shell are most com- mon. These are the chalky, lifeless pearls that are found so often but which have little value. Since a pearl is of no value as a gem unless it has a brilliant — 14 — lustre, the gem pearl must be formed entirely, or at least externally of the lustrous inner portions of the shell. These concretions of the bright inner strata of the shell are the gem pearls, which are valued so highly.
What to read after American Pearls?
You can find similar books in the "Read Also" column, or choose other free books by Washburn, Howard E to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The mantle is the part of the mussel that creates the pearl. In secreting the material that builds the shell, it occasionally happens that concretions of these materials are formed apart from the shell. These are pearls. When these occur they may be composed en- tirely of the substance of any one layer of the shell, or of all the layers of which the shell is composed.
Concretions of conchioline, the substance of the outer strata, occur, though rarely. They are usually of a dark brown color, oft...en quite transparent, but they have little commercial value. Concretions of the sub- stance of the second strata of the shell are most com- mon. These are the chalky, lifeless pearls that are found so often but which have little value. Since a pearl is of no value as a gem unless it has a brilliant — 14 — lustre, the gem pearl must be formed entirely, or at least externally of the lustrous inner portions of the shell. These concretions of the bright inner strata of the shell are the gem pearls, which are valued so highly.
What to read after American Pearls?
You can find similar books in the "Read Also" column, or choose other free books by Washburn, Howard E to read onlineMoreLess
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