Ekologik toza nishon uzuklarining yana bir varianti sintetik qimmatbaho toshlarni o'z ichiga oladi, masalan, laboratoriyada yaratilgan olmos yoki mozanit kabi. Laboratoriya tomonidan yaratilgan toshlar haqiqiy qimmatbaho toshning fizik va kimyoviy xususiyatlarini narxning bir qismini aks ettiradi, shuning uchun ular pulni tejashning ajoyib variantidir. Eng muhimi, ammo, an engagement ring that uses a synthetic gemstone in its design, is an environmentally friendly one, since colored gemstones (although mined from smaller digging sites) can still have negative repercussions on the environment.