The Jack was the first luxury golf ball marker ever crafted by Doubloon. The Spruce is a jack variant made from a Blue Apatite inlay set against an elegant Titanium base. The Jack broke the mold for what a golf ball marker could be and pioneered the category of fine jewelry for golf. Seasons change, but this timeless style remains firm as the standard for premier craftsmanship on the course. Note: Blue Apatite has more of a green hue than blue.