Regal Vintage Coin with Blue Quartz Necklace

Vintage 25 cent piece from the Netherlands. This regal coin has a beautiful crown on it and a faceted Light Blue Quartz point hanging off of it. Quartz point has a silver-plated top and is approximately 3/4" long.  Chain is antiqued sterling-silver and 18". All coins for this necklace are from the 1950's and 1960's.