What is one of the earliest materials used for sculptures that involves a subtractive method?

One of the earliest materials used for sculptures that employs a subtractive method is stone. Stone has been utilized since prehistoric times, with ancient artisans carving figures and objects from various types of stone. This method involves removing material from a larger block to create a desired form, as seen in famous works like classical sculptures and megalithic structures.

The use of stone for sculpting is notable because it allows for great durability and time permanence, which contributes to the historical significance of many stone sculptures still present today. Unlike clay, which can be molded and shaped through addition rather than subtraction, or wood, which can vary in hardness and decay over time, stone offers sculptors the ability to create detailed and lasting works.

Glass is also not considered a primary material for subtractive sculpture; it is typically used in processes involving additive methods like blowing or casting rather than carving. Thus, stone stands out as a foundational material in the historical context of sculpture and remains fundamental in the realm of subtractive sculptural techniques.