It depends on how it was used, but "unearthed" can definitely be used as an adjective.
Example: The unearthed relic was brought to the lab for inspection.
Yes. It can mean still not buried, or unearthed. The latter is a form of the verb unbury (dig up).
Unearthed Arcana was created in 1985.
The Bible Unearthed was created in 2001.
We have unearthed another victim in the forest.The team carefully unearthed the velociraptor fossil.It wasn't long until the detective unearthed all of the clues they needed to break the case.
Unearthed Arcana has 128 pages.
he unearthed diamonds
The Bible Unearthed has 385 pages.
The ISBN of Unearthed Arcana is 0-88038-084-5.
The past participle of "unearth" is "unearthed."
Unearthed - Nic Jones album - was created in 2001.
The guy hated earthed so much so he unearthed himself.
One can find information on Unearthed on the official Unearthed website itself. The websites includes a help and a FAQ section, it also has a forum where one can ask for information.