The mortar and pestle isn't made by players in the game. You can purchase on from herblore shops such as the one in Taverley.
A mortar and pestle made of glass is typically used for grinding and crushing substances into fine powders or pastes. It is commonly used in laboratories for grinding chemicals or in kitchens for grinding spices and herbs. Glass mortar and pestle are preferred for their non-reactive nature and ease of cleaning.
The mortar is a bowl-shaped container used to hold the ingredients, while the pestle is a heavy tool used to crush and grind the ingredients in the mortar. The pestle is typically a heavy and blunt object, while the mortar is a bowl with a smooth interior.
Chemicals are ground into powder using a mortar and pestle.
for powdering...
A mortar and pestle are used to grind substances into smaller particles.
Crucible, pestle and mortar
Crucible, pestle and mortar
A mortar and pestle made of glass is typically used for grinding and crushing substances into fine powders or pastes. It is commonly used in laboratories for grinding chemicals or in kitchens for grinding spices and herbs. Glass mortar and pestle are preferred for their non-reactive nature and ease of cleaning.
Try Pestle as in Pestle and Mortar
The mortar is a bowl-shaped container used to hold the ingredients, while the pestle is a heavy tool used to crush and grind the ingredients in the mortar. The pestle is typically a heavy and blunt object, while the mortar is a bowl with a smooth interior.
http://www.phisick.com/images/apoth/mortar-and-pestle-brass-101.jpg
it has traditionally been made of marble yet I am sure they can be made from many sources
Chemicals are ground into powder using a mortar and pestle.
The word pestle is generally used in connection with the word mortar. It is from Latin pistillum, an instrument used for crushing; the mortar is a kind of bowl, and the pestle is used to crush a substance to powder in the mortar.
A pestle is a bowl, usually made from a very heavy and dense stone used to crush seeds, herbs and spices in by using a mortar, which is made usually from the same stone. The two are usually used together, "Now grind the rock salt with your mortar and pestle until you have fine granules."
for powdering...
A mortar and pestle function primarily as a type of lever. The pestle acts as the lever arm, while the mortar serves as the fulcrum. When the pestle is pushed down into the mortar, it exerts force on the material inside, effectively grinding or crushing it. This simple machine allows for the efficient processing of substances, such as herbs and spices.