Cordierite board has remarkable characteristics, making it popular in various industries.

Thermally, it's outstanding. With a very low thermal expansion coefficient, it can endure rapid temperature changes without cracking or deforming, suitable for heat-sensitive applications like high-temperature processes. Its low thermal conductivity also helps maintain stable temperatures as it slows heat transfer.

Chemically, it's highly stable. Resistant to many acids, alkalis and corrosives, it can withstand harsh chemical environments, like in chemical plants. This durability allows long-term use even with substance contact without losing structural integrity.

Mechanically, it has decent strength and toughness. While not super hard, it can handle normal handling and machining. Its toughness prevents chipping during cutting and installation, ensuring proper shaping.

Optically, it's unique. Usually in light blue to purple shades, it's aesthetically pleasing. Its crystals show pleochroism, displaying different colors from different angles, useful for decoration and some optical instruments.

Finally, its porosity can be adjusted. Low porosity ones are good for sealing or waterproofing, needing a dense surface. High porosity ones can do filtration or gas absorption, using the larger pore surface area. In short, its diverse traits offer wide application possibilities.