This is a thumbnail example of Indonesian "Grape Agate". This interesting mineral is actually chalcedony in a botryoidal form, but is called Grape Agate due to it's appearance which resembles clusters of grapes.
This specimen weighs 5.4 grams and measures approx. 25mm x 20mm x 10mm.
Refer to the photos. The black centimeter cube is shown for scale and is not included. You are purchasing the specimen shown. Your purchase will include an ID label.