Time and Material durability

I put 3 solid objects into 3 different environment. 1st: being displayed inside a glass containment in a museum 2nd: on a table of a house in tropical region, 2000 km away from the equator 3rd: under the ground (1-7 meter depth)

What kind of material should the objects be made of to make it last the longest in these specific environments and how long?

Further condition: There's no major change in Earth history that can affect the objects. No human interaction with the object direct or indirect. However, the objects may be exposed to rain, sun light, radioactivity, wind, living organism on Earth.