To find rare materials in Monster Hunter Rise, you need to explore the various maps and follow specific locations for each type of material. Here’s a detailed overview of where to find some of the rarest materials:

### 1. **Shrine Ruins**
– **Iron Ore and Earth Crystals**: These are common in all maps but can be found in Shrine Ruins. They are not exclusive to this area but are abundant here.
– **Carbalite Ore**: This becomes common in all areas but is first encountered in the high-ranked version of Shrine Ruins.

### 2. **Frost Islands**
– **Icium**: Found in low-ranked and high-ranked versions of Frost Islands. It is more common in high ranks but can still be found in low ranks.
– **Gracium**: Exclusive to high-ranked Frost Islands. It is found in the same areas as Icium but is rarer.

### 3. **Sandy Plains**
– **Machalite Ore**: First encountered in low-ranked Sandy Plains but becomes common in other areas, especially in high ranks.
– **Fucium Ore**: Found in high-ranked Sandy Plains, more commonly around and inside the pyramid on the bottom right, but also around the whole map.

### 4. **Flooded Forest**
– **Lightcrystals and Clear Crystals**: Found in low-ranked Flooded Forest and become more common higher up. Exclusive to this area in low rank.
– **Novacrystal**: Exclusive to high-ranked Flooded Forest, more commonly around and inside the pyramid on the bottom right.

### 5. **Lava Caverns**
– **Dragonite Ore**: Found in low-ranked Lava Caverns and becomes common in all areas.
– **Firecell Stone and Firestone**: Exclusive to high-ranked Lava Caverns. The best place to gather these is by switching to the lower-tiered version of the map to see three deposits below zone ten.

### Additional Tips
– **Sub-Camps**: Unlocking sub-camps can provide access to rare deposits. For example, in Sandy Plains, unlocking the second sub-camp allows you to gather Fucium Ore underground.
– **Temple Locations**: Some rare materials are found inside temples. For instance, in Flooded Forest, you need to head inside temples to find Lightcrystals and Clear Crystals.

By following these locations and tips, you should be able to gather most of the rare materials needed for your hunts in Monster Hunter Rise.