For example, Zodiac desk pieces come in patina, gold dor , statuary bronze dor , and rarely in silver. Other patterns are found in only one finish. Bookmark, Ninth Century, Abalone, and Venetian are examples of one finish patterns. Variations can still be found. Occasionally hand enameling was added to some patterns such as Zodiac or Bookmark.
Colored stains add another variation.
These were sometimes put in the recesses of patterns like Bookmark. For every collector there is a different style of collecting. Some collectors stick with one pattern. Some try to collect enough pieces to make a nice display on a desk. Others are looking to find every known piece in a particular pattern.