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Additional recommended knowledge
First Water = Highest Quality.
The term originates from the gemstone trade. The clarity of diamonds is assessed by their translucence; the more like water, the higher the quality. This comparison of diamonds with water dates back to at least the early 17th century, and Shakespeare alludes to it in Tymon of Athens, 1607. The 1753 edition of Chambers' Encyclopedia has this under an entry for 'Diamond':
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "First_Water". A list of authors is available in Wikipedia.|