This was Himalayan nard. The experts tells us, that there were only a couple of places where it grew, up in the Himalayas, and it had to be transported all that way, up and down mountains and through passes, and then, of course, eventually, to the Holy Land; and it was enormously costly.
This was not, by the way, the same event as is recorded earlier on in Luke’s Gospel in chapter 7, when a woman, who was a repentant prostitute, came and anointed the feet of the Lord, and wept, and wiped his feet with her hair, and her tears. That was a very different event, which occurred early in Christ’s ministry. That wasn’t Mary, the sister of Lazarus. That woman wept, but Mary didn’t, and the host, on that occasion, was also named Simon, but this is Simon the leper. The other Simon – a notable Pharisee – well he was hostile to Christ, and he was reproved by Christ.