Turquoise is a hydrated phosphate of aluminum and copper, it is an opaque mineral that has colors ranging from uniform blue to green or with brown or black veins. As it is a very porous mineral, its original color can change easily. And this is why, to protect its surface, treatments are carried out during […]
The difference between precious stones and semi-precious stones essentially lies in their rarity. Stones like diamond, ruby, or emerald are rare and, consequently, have a high market value. For this reason, semi-precious stones, which are more abundant in nature, have a lower value despite their characteristics. In fact, a semi-precious stone, both physically and aesthetically, […]
Many semi-precious stones are defined, in gemology, as semi-precious stones referring to some specific categories of stones. Some others, rarer to find, such as diamonds, emeralds, rubies and sapphires are defined as precious stones. However, this categorization is a practice that has become current even though it does not have an effective scientific motivation. For […]
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