Envision Crystals Full Moon Oil, 4 Dram David Harrington Practice draws a useful line:

Practice draws a useful line: the dark moon is the moonless end of the cycle

The goddess charm files the besom under the Lady's keeping

use a felt pad under it on delicate furniture

and modern crystal practice has run with exactly that: Dragon Blood is kept for courage

The kalyna lineage

Envision Crystals Full Moon Oil, 4 Dram David Harrington Practice draws a useful line:The maker's oil cabinet gains its lunar member. Envision Crystals Full Moon Oil bottles the cycle's culmination at 4 drams: the anointing blend for the month's brightest working night, from the same maker as our Money, Lavender, and Evil Eye oils, for dressing full moon candles, anointing before esbat rites, and keying tools and intentions to the tide's peak. Every lunar practice keeps one night circled on the calendar. This is the bottle for that