There is limited information available about the specific properties of Turkey Light Green Onyx, but in general, onyx is known for its delicate and brittle nature. This makes it less suitable for exterior applications, especially in very humid climates.

Onyx is a sedimentary stone that is formed in caves and often composed of layers of calcium carbonate. It is considered a less durable and less resistant stone compared to granite or quartzite. Being delicate, onyx is more prone to cracking, chipping, and fading if exposed to harsh weather conditions.

In very humid climates, where there is abundant moisture and humidity, the risk of damage to onyx increases. Moisture can seep into the stone, leading to discoloration, efflorescence (white salt deposits), and even deterioration of the material. Moreover, the constant presence of humidity can support the growth of molds and mildew, which can further damage the stones appearance and structural integrity.

In light of these considerations, it is generally advised to use more suitable and durable materials for exterior applications in very humid climates. These could include materials such as granite, quartzite, or certain types of porcelain tiles that are specifically designed to withstand such conditions.