Here's a 1 1/2" contemporary shamrock sulphide.

Here's a 1 1/2" contemporary with waves and spikes color.

Made in Germany around the late 1800s, here's a rare sulphide from the collection of Damian and Harlan Walters.

Made in sizes 0, 1 and 2 and of translucent glass with a narrow, distinct strip of opalescent glass and and opaque stripe in black, red, yellow, blue or green. These aces measure 1" and were made in the 1930s or 1940s.

Here's a beautiful contemporary piece by the very talented Jim Cooprider. Electric-red and orange, this marble measures 1 1/4".

Pistachios have a fluorescent green base with black stripes and were made in the 1930s or early 1940s. They were first believed to have been made by either Christensen or Champion, but now are widely believed to have been made by Alley Agate Company. Thes

Here's a beautiful wooden solitaire gameboard with handmade German swirls. From the collection of Tom Harrod.

Gunieas are arguably the most recognizable marble made by Christensen Agate. Made in the 1930s, the blue and amber based gunieas pictured measure 9/16".

Hand painted China Marble owned by Paul Germann. .

Dated 1989, and measuring 1 1/4" and a 1", here are two handmade and painted clay marbles by Gene Weber.