Combine the beeswax and apricot kernel oil in the heatproof jar or empty tin can.
Set the jar, or can, down into a saucepan containing several inches of water.
Place the pan over a medium burner to indirectly melt the beeswax. Keep a close eye while the oil/wax heats.
Once melted, remove from heat and cool briefly.
If adding a preservative (Phytocide Elderberry OS), do so now.
Add the honey and stir briskly for one full minute.
Add the rosehip seed oil, and lavender essential oil, if using.
Stir thoroughly, and allow the mixture to sit until it starts to thicken.
Stir, stir, stir some more as it cools! The mixture will turn creamy and opaque. You must stir the honey in thoroughly, to keep it from beading out.
Spoon into a glass jar. Store in a cool place and use within 3 months.