Place the coffee grounds and dried rose petals in an 8-ounce heatproof glass canning/jelly jar.
Pour the sweet almond (or jojoba or apricot kernel) oil into the jar and stir well.
Place the jar into a small saucepan filled with a few inches of water, forming a makeshift double boiler.
Heat the pan over a low burner for one to two hours. If you don’t use a tea bag, the oil will look very sludgy at first.
As an alternative infusing option: Cover the jar containing the oil and coffee/rose petals with a lid. Instead of heating, tuck the jar in a cupboard for 3 or 4 weeks, shaking every day or two, or as often as you remember.
Strain the richly scented oil through a fine mesh strainer to remove most of the coffee grounds and the spent rose petals. You may need to line the strainer with cheesecloth to catch the finer grounds.
If your oil still has some scratchy coffee bits in it, let the oil settle for several hours, before pouring through cheesecloth into a fresh jar, leaving the layer of sediment behind in the original jar.
Once the coffee oil is room temperature, stir in the rosehip seed oil and mix well.
Transfer to a dropper bottle or roller ball applicator.
Label and store in the refrigerator for up to 6 months.