- The stone that we buy from a store and it is polished cannot be ascertained whether it is treated or not except in the laboratory
- Stones that we find in nature (mountains or valleys) have a stone glass luster and not a metallic luster such as silver or gold.
- The stones with inscriptions that are not natural and most imitation.
- There are opaque, natural, opaque stones that have a luster such as (turquoise and malachite)
- There are similar stones to the naked eye such as (white zircon, diamonds, white topaz and some types of pure quartz)
- There are similar green stones like (green tormelin, green fluorite, and emerald green)
- The shape of the stone has nothing to do with the value and quality of the stone, if its shape is round, hexagonal, or in the form of animals or birds because erosive factors may form it in this way and there are no secrets
- If the hardness of the stone exceeds 7.5, it will be precious stones (diamond, chrondome, sapphire ...)
- Some stones are attracted by the magnet, such as "Al-Taigr (the eye of the tiger)", and some rare stones attract iron in which there is a natural magnet and they are called the magnet stone
- Some stones fluoresce with ultraviolet rays
- Emerald steatite is widespread in large quantities in the Hijaz and has no value, but some traders sell it on the grounds that it is emerald.
- Below the ground is more beautiful than the top, in the ground there are pure stones and large crystals
- There are red-colored stones that are ignited with water or pressure on them are fake artificial stones (made in China or Indonesia) and are sold on the basis of natural spirituality
- Stones are transparent or translucent, like glass or ceramic
- There are fragile or metamorphic sedimentary stones that have small very shiny points. These are not gemstones. These tiny atoms of shiny, inconsistent silica are each atom separately and may be atoms of shiny silver or "pyrite" that are worthless, suitable to be a decorative stone.
- Gemstones are groups or families such as the "quartz" family, the "corundum" family, and the "brill" family.