Einsteinium is a synthetic element, meaning it doesn't occur naturally on Earth. It's incredibly rare, and we can only make small amounts of it in labs. So, it's impossible to describe what einsteinium looks like in its pure form.

Here's what we know:

* Color: It's likely a silvery-white metal, like most other actinide elements. However, no one has ever seen a macroscopic sample of pure einsteinium.

* Appearance: Due to its rarity and radioactive nature, we can't study it in its pure form. Any observation would require specialized equipment and strict safety protocols.

In short, while we can imagine what einsteinium might look like, we haven't actually seen it in a visible form.