The Bakota (or Kota) are a Bantu ethnic group from the northeastern region of Gabon. Estimates indicate that there are at least 43,500 Kota speakers in the world, of whom 34,442 people (79%) live in the Ogouee-Ivindo province of northeastern Gabon, and 9055 people (21%) in neighboring Congo-Brazzaville.
I think its "Icons". It all depends on what church branch.
They used Bronze and colored beads.
Not sure if this is what you need.... but....it is the teaching of the Catholic Church that in the Eucharist the appearance is quite unchanged, but the basic reality has become the body and blood of Christ.
The change from bread and wine to a presence of Christ that is true, real, and substantial is called transubstantiation.