Classic
Classic styles have elements that have stood the test of time and are still popular, such as baguette cut diamonds, clean lines, channel setting and lack of milgraining or engraving.
Estate
Estate style jewelry is noted for being on the flashier side: ornately designed necklaces or rings filled with diamonds fall under this category. One may even find brooches in the shapes of various plants that also have diamonds included in them. Estate jewelry is typically categorized by being 50 years old or more
Vintage
Vintage rings are typically categorized as being 100 years old or more. It is used to describe either pieces that are of that age or modern pieces done in the style of that time, using filigree, milgrain, many tiny diamonds, bead setting, all with a delicate look and usually in white metal. Mid-century jewelry style is usually yellow, large expanses of metal with larger, single stones with clean, simple lines.