I recently received yttrium and erbium as a generous gift from one of my family members. Here are the metals in their original containers.
As these are rare earth metals, they look and react similarly. However, erbium forms pinkish compounds, while yttrium forms colorless compounds. Here are more detailed photos of these metals. The upper photo is of erbium, while the lower is of yttrium.
These metals were purchased from Metallium, Inc. (http://elementsales.com ) They have a wide range of elements available in several forms for moderate price.