I think any mineral ore deposits can be in all of areas in world with attention to my past experiences on field and scientific experiences.

The formation of diamond need to a very high pressure in an exhumation event. I do not sure if we had an exhumation in the eastern part of Iran.

The possibility of diamond ore deposits in eastern Iran is low but cannot be entirely ruled out. Diamonds form in stable cratonic lithosphere, typically over 1.5 billion years old, with thick continental roots conducive to their preservation and transportation by kimberlite or lamproite magmas. Eastern Iran predominantly features complex tectonic zones formed by collisions between the Arabian, Eurasian, and Indian plates. This area is characterized by active tectonics and younger lithospheric formations, which are less likely to host cratonic conditions necessary for diamond formation.

However, remnants of older terranes or tectonic settings associated with mantle-derived magmatism, such as ophiolite belts or high-pressure metamorphic rocks (e.g., those found in Makran or Lut regions), could theoretically have carried mantle-derived materials, including diamonds. Thus, exploration focusing on tectonic settings conducive to deep mantle magmatism might yield insights, although the geologic conditions of this region generally reduce the likelihood of economically viable diamond deposits.