The consecration of an altar in an Orthodox church is something that few people, even clergy would experience. I discovered this video of a new altar being consecrated in Glen Cove NY. From their diocesse website
On Saturday, November 26, the First Hierarch of the Russian Church Abroad, His Eminence Hilarion, Metropolitan of Eastern America & New York, arrived in Glen Cove to celebrate the Divine Liturgy and lead the parish’s 60th anniversary celebrations. Before the start of Liturgy, the First Hierarch performed the rite of consecration of the new altar table in the renovated church.
“This is a special rite, when the relics are placed under the altar table and the humble gifts of the earth, which the Lord Himself gives us, are added – holy water, myrrh, wine, oil, and wax-mastic,” explained Archpriest George Zelenin. “The Orthodox Church established early on that the Divine Liturgy can only be celebrated on the relics of martyrs. This invisibly binds together our entire Church from Her very inception – from the holy apostles to our own day. The martyrs are the strength of our Church.”
Photographs of the consecration can be found here