To a double boiler, add the distilled water along with the rosewater and gently boil while you measure out your oils.
Use a kitchen scale to weigh out each and every ingredient.
Then, heat the oils and the emulsifier in a double boiler until the emulsifier has completely melted, and all ingredient are combined.
While still hot, combine the distilled water and rosewater with the oils and emulsifier mixture. As it cools, the mixture will thicken and become more opaque.
If you see that your cream isn't emulsifying properly, that means it's a temperature problem. To fix this, simply heat again in a double boiler, stirring well.
Allow the mixture to cool completely before you go ahead and add in the preservative and any essential oils.
Pour the moisturizing cream into a clean and disinfected container of your choice.