Heirloom
An ordinary mineral becomes part of an unusual task. Heirloom uses limestone-based mineralization in its approach to removing carbon dioxide from the air.
Why Global58 noticed them
A familiar mineral becomes a test of whether carbon removal can work as repeatable, measurable industrial infrastructure.
Teaching limestone to capture carbon faster.
Heirloom is turning a familiar mineral into a reusable tool for atmospheric carbon removal. Its journey from Tracy to planned Louisiana facilities reveals the distance between promising chemistry and dependable climate infrastructure.
