The material I have learned to sculpt minis with is an epoxy putty that comes in blue and yellow parts, which is mixed together to form a green substance. This material seems to be pretty much prevalent in use in the sculpting community, and is why original miniature sculpts are referred to as “Greens”, even though sometimes putties of differing colors are sometimes used. Recently, a new sculpting material known as “ProCreate” (I know, sounds kinky) has come available on the market. This putty is grey in color when mixed, and you can see that some of my newest sculpts utilize this material. So far I really like it, and will probably use it more and more.
Below are some images of some of the greens I have sculpted to date, with , in general, older sculpts appearing first, and newer ones populating the list towards the bottom as I add them.