The knives you see above are called “bolines” or “bollines”. They are used in the practice of Wicca; for cutting cords, plants, herbs, candles and other such things. For more info on what Wicca is and what it ISN’T, click here: LINK. Traditionally, the boline has a white or light-colored handle, especially if it is intended to be used for white magic.
"This crescent shape is reminiscent of the sickle described in the Key of Solomon, a medieval grimoire which is one of the sources for modern Wicca.. Confusingly, an Italian version of the Key of Solomon has a hook-shaped knife called an artauo (a possible root for athame) and a straight, needle-shaped blade called a bolino. When the name ‘boline’ was first used to describe the crescent-shaped blade is not clear. In The Book of Ceremonial Magic published by Arthur Edward Waite in 1911, Waite references a number of early works on magic which mention the bolline or sickle, saying "Among the necessary properties mentioned by the Book of True Black Magic are the sword, the staff, the rod, the lancet, the arctrave or hook, the bolline or sickle, the needle, the ponaird, a white-handled knife and another knife, with a black handle, used to describe the circle. The most important to make is that called the bolline…."
The similarities between the boline and the Crescent Moon Wand are undeniable, but whether or not they are intentional remains unknown. However, this would not be the first instance when objects used in magick or occult practices are used in anime and manga, and not even in Sailor Moon. Later on I’ll post about the triple goddess and how that arguably connects to the royal ladies in SM. One should also take into account the way that different gemstones are a part of the Sailor Moon universe - as that, too, is more or less part of such practices. Every stone has its own symbolism and supposedly its own energy :).
This isn’t a negative thing, however. Nor should it be taken as “Satanistic” or be given whatever other negative connotation. We’re not on a witch-hunt here, we’re not here to judge… we’re just looking at the cultural influences in our favorite manga-anime series :)