Yes, that is Fr. John Mary blessing a basket of rocks!
A friend who lives at a great distance requested some blessed rocks from the Mission because she wished to give them to family members. It is her way of sharing some of the graces she experienced at the Mission with her family. It reminded me of a quote that we used here recently:
"The blessing of the priest
is a great means
good is made to triumph over evil,
love over hatred,
and mercy over judgement."
In Sinu Jesu"
When Heart Speaks to Heart
The Journal of a Priest at Prayer
But prayer should flow in both directions. The graces that God bestows on His priests at their Ordination do not come without cost to them. As Jesus reminds St. Faustina, we need to pray for our priests:
Today, I saw the Lord in great beauty, and He said to me
My loving host,
especially during this time of harvest
Diary of St. Faustina
Divine Mercy In My Soul