Yes, Australias Bookleaf Bluestone is suitable for exterior applications in very humid climates. Bluestone is known for its durability and resistance to moisture, making it a popular choice for outdoor applications such as paving, wall cladding, and landscaping.

However, its important to consider proper installation techniques and maintenance to ensure the longevity of the stone in humid conditions. Adequate sealing and regular cleaning can help protect the stone from potential moisture-related issues such as staining or efflorescence. It is also recommended to consult with a professional or the supplier for specific guidelines on using Bookleaf Bluestone in your particular climate and application.