Some *possible* symbolism in the materials of the Tabernacle:

Gold and white linen = purity/righteousness
Silver = blood/atonement/redemption
Bronze = judgment/repentance
Wood = Living flesh, aka man

The Cherubim on the Ark of the Covenant are two witnesses and probably represent the Cherubim in God's throne room.

Rav Tachuma said the acacia trees for the wood were planted in Egypt by Jacob and harvested by Moses at the Exodus. Probably not literally true, but consider that Israel is also a Tabernacle planted by Jacob and harvested by Moses at the Exodus.

See more possible symbolism here...

https://soilfromstone.blogspot.....com/2017/03/materia