Hematoid Quartz is a type of quartz that contains traces of hematite, which gives it a reddish-brown color. While quartz is generally a durable and hard stone, the presence of hematite in Hematoid Quartz may make it less suitable for outdoor use.

Hematite is an iron oxide mineral that can be easily affected by exposure to moisture, weathering, and oxidation. When used outdoors, Hematoid Quartz may be susceptible to fading, discoloration, or deterioration over time due to these factors.

Therefore, it is generally recommended to avoid using Hematoid Quartz in outdoor settings where it will be exposed to the elements. It is best to use this semiprecious stone in indoor applications, such as jewelry, decor, or furniture, where it can be protected from direct contact with moisture and harsh weather conditions.