a high-quality paper (usually having a filler of china clay)

a high-quality paper (usually having a filler of china clay)

a high-quality paper (usually having a filler of china clay)

a high-quality paper (usually having a filler of china clay)

a high-quality paper (usually having a filler of china clay)

clay or silt or gravel carried by rushing streams and deposited where the stream slows down

clay or silt or gravel carried by rushing streams and deposited where the stream slows down

clay or silt or gravel carried by rushing streams and deposited where the stream slows down

clay or silt or gravel carried by rushing streams and deposited where the stream slows down

the clay from which adobe bricks are made