W I N E

Obsidian is abundant on the grounds of Seiler Estate, and weaves deep into the soils of the vineyard. It provides an exceptional terroir that imbues our grapes with a rich minerality and full bodied flavor that sets the wine apart from anywhere else in the Napa Valley.

Obsidian is a unique lava that forms when the silica content is very high and the water content is low. The lava must cool quickly, and when it does, it creates a luscious, black, glass-like stone, free of crystal formations or bubbles.

Glass Mountain was once the armory of the Wappo natives, who used the obsidian’s mirror-like sharp edges to create elaborate multi-edged arrowheads for weapons. There is an archaeological site behind the wine cellar on Seiler Estate where the Wappo made their weapons.