1. Natural gemstones are durable, beautiful and rare minerals produced in nature, and can be processed into jewelry single crystals or double crystals. Such as diamond, ruby, sapphire, chrysoberyl, aquamarine, beryl, topaz, garnet, spinel, olivine, tanzanite, moonstone, zircon, tourmaline and crystal.
Second, natural jade is a durable, beautiful and rare mineral combination with scientific and technological value produced in nature, and a few are amorphous. Such as jade, nephrite, opal, turquoise, lapis lazuli, agate, malachite, Tian Huangshi, bloodstone, Shoushan stone, Qingtian stone, etc.
3. Natural organic gemstones, which are generated in nature, are partially or completely composed of organic substances and can be used as materials for making jewelry and decorations, such as pearls, corals, clams, amber, beeswax, coal crystals, ivory, etc.
It's the first time I've heard of the "Senbei natural gem" you mentioned. I heard that the price is also cheap. Therefore, if you want to give it to your girlfriend, it will be very difficult to be valuable. If your girlfriend is beautiful, forget it! The most important thing to give a gift is to see if your girlfriend likes it or not! Just like it! Besides, what you like is not necessarily what she wants! What did you say?/Sorry?