This question is for any Deacons out there, but obviously for anyone else who has an extra 2 cents laying around.
From what Iāve read Deacons (in the Roman Rite) can bless
most sacramentals, so what exactly canāt a deacon bless?
And when youāre asked to bless a rosary, a miraculous medal, any saint medal, a crucifix, etc. do you use different formulas for each one, do you ad lib one? What actually constitutes a blessing? (Does the sign of the cross have to be made, the invocation of the Trinity, the name of reference of the person who will use the sacramental, etc)
-AJ
I deacon can only impart those blessings which the Church specifically allows him to perform. See canon 1169.3
That means that the ādefaultā answer to your question is āno.ā Thatās only the starting-point, however. From there, we must look at the individual blessings to determine if a deacon can impart the blessing or not.
Here are a few examples:
A deacon may bless most sacramentals (crosses, medals, statues, etc. etc.) intended for private devotion (specifically excluding those displayed in a church or chapel). See the Book of Blessings number 1442 and 1444. #1444 states āthe present order may be used by a priest or deacon.ā
Contrast that with the blessing to be used for āObjects for Use in Churchesā which specifies that only a priest can perform these blessings (Book of Blessings #1261).
A deacon can bless a rosary. There is a special blessing for a rosary, and deacons are specifically permitted to use it (BB 1465).
However, when we look at the blessing of a scapular (BB 1488 and following) there is no mention of a deacon performing the blessingāwhich means that he cannot do so.
Now, hereās the thing: The specific blessing of a scapular implies membership in a confraternity. If thatās the case, the deacon is not able to perform the blessing. Yet, at the same time, the Book of Blessings (#1442) specifically mentions āscapularsā in that more generic blessing of items for private devotion (remember, thatās the one that deacons may indeed do the blessing). So, if one has a scapular purely as a matter of private devotion, the deacon can bless it. On the other hand, if itās a scapular presented as part of an induction into a confraternity, only a priest can bless it.
Remember that the Churchās laws/norms state that a deacon can only perform the blessing if the Church specifically permits him to do it. This differs from the blessings given by priests, as priests can perform any legitimate blessing unless the blessing is reserved (either to a bishop, or to specific presbyters).
In practical terms, the priest asks himself āis this blessing specifically reserved, meaning that I cannot do it?ā While a deacon must ask himself "does the Church specifically permit me to do this blessing?"
There is really no simple answer to your question. Itās a matter of determining exactly what blessing weāre talking about and then looking at the text of the blessing itself to see if a deacon can do it.
Some examples of blessings that cannot be done by a deacon:
Blessing of a chalice. Book of Blessings #1362
Blessing of church bell. BB1309
Blessing of a cemetery (however, a deacon can bless an individual grave in an un-blessed cemetery). BB 1419
Blessing of a cross for public veneration (a deacon can bless one for private devotion) BB 1236
As for items intended for liturgical use (pyx, alter linens, hymnals, etc).
A deacon can bless these when he uses the short form outside of Mass (BB 1346), but only outside of Mass. If the blessing is done within the Mass, it must be done by the priest.
A deacon cannot bless missionaries (BB 453) but he can bless travelers (BB 618).
Confused yet?
At the risk of being redundant, the way to answer your question is to say that deacons can only do those blessings which the Church specifically says he may doāand thatās a matter of looking at the particular blessing for the occasion/object and seeing whether or not heās able to do it.
If it says he can, then he can. If it does not specifically say that he can, then he cannot.