1. Hardness: the hardness of quartzite jade is 6.5-7, and that of agate is 7. Agate is slightly harder, more wear-resistant, and can keep luster for longer.

2. Value: The value of agate and quartzite jade depends on its scarcity, color and texture. The value of agate is usually higher than quartzite jade, but quartzite jade also has its unique beauty and value.

3. Energy and spirituality: Quartzite jade is considered to have high energy and spirituality, has the characteristics of purifying and balancing energy, can help restore physical and mental health, and can also be regarded as a lucky stone. On the other hand, agate is considered to have sedative and protective effects, which helps to relieve stress and anxiety.

4. Use: Quartzite jade is often used in decoration, architecture and other fields. Because of its hardness and texture, it can be used as wallboard, floor, etc. , and can also be used for carving and making ornaments. Agate is often used to make jewelry, and its unique color and texture can increase personal temperament when worn.