Is it really worth it?

im getting this necklace and you can choose the gemstone ----- the gemstone i like is the turquoise and i really like the zambian emerald ( extra $8.00 ) and everywhere i find the locket on discount for $40.00 ( original price is $100.00 ) the zambian isnt included ---- this is the website where the locket is $100.00 ( gemstone selection on bottom of page ): http://www.sterlingsilverart.com/p787/EXACT-REPLICA-VERSION-Sterling-Silver-Locket-Pendant-like-a-Merm/product_info.html?osCsid=f3f2dedc9af15e7fb61f748cd2fb8dbd ----- what should i do --- get the $40.00 with the turquoise or the $108.00 necklace with the zambian emerald? ---- if you dont like either, tell me which one i should get ---- i also kind of like citrine, and black onyx and i dont like the amethyst or the pink opal