How was the purple ink in medieval manuscripts made?
From indigo
From purple-blue rocks found in the mountain ranges of Scotland
From the blood of sea snails

I think it was made from the blood of sea snails, specifically the Murex snail. this ink was also used to dye clothes (especially royal clothes) and other things!

hope this helped!!

earliest

neumes above text

neumes

colored lines

neumes

4-line staff

f, c, or g clef

notes on 5-line staff with clef

mensuration (longas and breves)

time signature (perfect or half circle)

most recent

notes on 5-line staff

modern clefs

modern note values (whole, half, quarter, and so on)

modern time signature

italian words and abbreviations for dynamics and tempo

staccato, slurs, and so on