Diamond Buttons. Diamonds are the most precious of all gemstones and, as such, diamond buttons can fetch high prices. Some buttons have been produced consisting of just diamonds but others are made where the diamonds are used to accentuate other gemstones or images.
Below are some examples and price guides of diamond buttons including a white gold and diamond dress set with button studs and cufflinks and an antique button with rose cut diamonds.

A French portrain button surrounded by diamonds and rubies
Reference: The Metropolitan Museum of Art

WHITE GOLD AND DIAMOND DRESS SET including a set of cufflinks and button studs with diamonds weighing approximately 2.30cts, together with a textured white gold tie pin, mounted in 14k white gold
Sold for US$1,275 inc. premium at Bonham’s in 2020

ANTIQUE DIAMOND BUTTON
Rose-cut diamonds in closed-back settings, mounted in silver, circa 1800, 2.2 cm
Sold for GBP 750 at Christie’s in 2021

Rare Victorian 14K Y/G diamond button (0.4″dia), center an excellent quality European cut diamond wt. approx. 0.25ct
Sold for $120 at International Auction Gallery in 2021