If you mean on Nabooti island, I believe that there are only purple, green, red, white, blue, orange, and yellow. There is no black jewel!
the green jewel is where the green jewel should be
All of them are needed to win.
it is on the treehouse
in the jewel mines on the lower center of the map.
That really depends.
There is no "real Poptropica jewel" The jewels are red, purple, green, blue, yellow, orange (counting already "found jewels."
it isn't a jewel its a orb. and you have to defeat Mordred
the white jewel is the one that kinda has a triangle symbol on it
it is in Giza in the tomb
you dont need it
you just click it
there is a blue jewl in Giza 4