Prismacolour pencils used:-
Tear drop gemstone - dark green, Prussian green, kelly tree, sap green light, pale sage, grey green light
Opal - black cherry, dark purple, dahlia purple, lavender, deco yellow, cream, white gel pen
Large gem - China blue, cobalt blue, blue lake, Caribbean Sea, blue slate, power blue, cloud blue, white gel pen + hints of lilac and chartreuse