Last week at our centre the two resident geshes performed a rather elaborate consecration ritual. I will see if I can upload some photos.
One of the Dutch monks prepared mantra rolls using saffron water and set them out, along with the statues, in front of the altar. There was I believe
some kind of boundary purification ritual that day.
The following morning, when I did attend, we started the ritual with the 6 Session Guru Yoga and Yamantaka Sadhana. Then there followed an elaborate ritual which incorporated a bath offering, invitation to Yamantaka to reside together with the image and the recitation of various mantras (not necessarily in that order, I was struggling to follow as many texts were used and there was a lot of back and forth.
Then, there was a ritual inviting each of the 5 dhyani Buddhas to reside as well as as invitation and request verses to a wealth deity called Nojin as well as Dzambhala and Ganapati. We then recited many times a set of a number of mantras referred to simply as "mantras of the Fathers and Mothers".
I am wondering if with the exception of Yamantaka this is a pretty standard ritual across the various schools of Tibetan Buddhism. At a certain part we all held the a string that was attached to the statues and mantras while we recited certain sanskrit syllables.
A foolish man proclaims his qualifications,
A wise man keeps them secret within.
A straw floats on the surface of water,
But a precious gem placed upon it sinks to the depths