There are actually two kinds of a Black Scapular.
One from the Passionists. The Scapular is called the "Scapular of the Passion of the Lord"
The tradition of the Passionists holds that before St. Paul of the Cross founded the Congregation of the Passionists he had a Marian apparition during which he received the black habit of the order with the badge on chest. Thereafer, the Passionist Fathers gave the faithful who wished to associate themselves more closely with their order a black scapular in honor of the Passion of Christ. This small scapular has a replica of the badge of the Passion, namely a heart with three nails above a cross, on which is written "Jesu XPI Passio" and below "sit semper in cordibus nostris". The other portion of the scapular hanging at the back, may consist simply of a small segment of black cloth, but at times has an image of the Crucifixion of Christ.
The indulgences for the scapular were extended to all the faithful who wear it by Pope Pius IX in 1861. Various other indulgences for the faithful who wear this scapular, were then approved by the Congregation of Indulgences in 1877
And the other from the Servites. This scapular is called the "Scapular of the Seven Sorrows of our Lady"
Members of the Confraternity of Our Lady of the Seven Dolours honour the Seven Dolours of Mary, and wear the black scapular of the Order of Servites, sanctioned in 1255 by Alexander IV. The scapular is in black cloth like the habit of the Order, bearing an image on the front of it of the Mother of Sorrows. It bears the indulgences of the Confraternity if worn constantly, and one must go back to 9th March, 1888, for a summary of these indulgences approved by the Congregation of Indulgences.
You can read more about these two Black Scapulars by clicking here (for the Passion) and here for the Seven Sorrows and about all scapulars here.
A brotherly reminder my dear TPC readers.
It is not in how many you are wearing, but it is in how what you are wearing affects you in your relationship with God and your fellowmen.
I have seen people wearing a lot of medals and scapulars around their necks they would rival B.A. Baracus (Mr. T.) of the A-Team with the number of necklaces worn.
Stay focused my dear friends. As one of my patron saints, St. Louis de Monfort wrote:
“All our perfection, consists in being conformed, united and consecrated to Jesus Christ; and therefore, the most perfect of all devotions is, without any doubt, that which most perfectly conforms, unites and consecrates us to Jesus Christ. Now, Mary being the most conformed of all creatures to Jesus Christ, it follows that, of all devotions, that which most consecrates and conforms the soul to Our Lord is devotion to His holy Mother, and that the more a soul is consecrated to Mary, the more it is consecrated to Jesus” (Treatise on True Devotion, n. 120).