Glass Brick is the fired glass intermediate in Starsand Island. The glass chain runs in two steps: Quartz Ore is fired into Glass Brick at the Furnace I, and Glass Brick is then cut into Glass Pane at the Cutter I. A few recipes use the heavy brick form directly.

Firing Recipe
Detail | Value |
|---|---|
Station | Furnace I |
Ingredients | 4 Quartz Ore + 1 Charcoal |
Output | 1 Glass Brick |
Where to Get Quartz Ore
Quartz veins cluster around the Gate of Life and nearby sections of the Moonlit Forest. See Ores and Resources for the full mining breakdown.
Major Uses
Glass Pane production. 1 Glass Brick cuts into 1 Glass Pane at the Cutter I; panes are the form most furniture and station recipes want.
Bait Maker. The Bait Maker station is built from 5 Glass Bricks + 1 Solid-State Battery at the Worktable.
Sewing Table. Building the Sewing Table takes 4 Glass Bricks.
Direct-use decor. A handful of recipes, such as the Prism-3000 Rod and some bathroom fixtures, consume the brick form directly.
Tips
Cut most bricks into panes. Panes have far more consumers than bricks; keep only a small brick reserve for the recipes above.
Related Articles
Quartz Ore
Glass Pane
Cutter
Sewing Table