Complex sentence: Yule's quality and uniqueness comes at a high price due to the cost of quarrying in a high altitude mountain environment resulting in many boom and bust periods since quarrying started in the mid 1880s.
Split into simpler sentences: Yule's quality and uniqueness come at a high price due to the cost of quarrying in a high altitude mountain environment. This challenge has caused the industry to undergo many boom and bust periods since quarrying started in the mid 1880s.