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November Birthstone and Their Gemstones: Citrine and Topaz November is associated with two beautiful gemstones: Citrine and Topaz. The name Citrine is derived from the French word citron, meaning lemon, because of its characteristic yellow, yellow-orange, and brownish-orange hues. Light yellow Citrine is often referred to as “Lemon Quartz.” Unlike Citrine, Topaz exhibits a much wider range of colors, including colorless, blue, pink, violet, brown, yellow, golden, orange, and more. A variety known as "Imperial Topaz" is especially valuable for its reddish-orange to orange-red hues. Additionally, the yellowish gemstone group includes Heliodor ("Golden Beryl"), which ranges from lemon-yellow to golden-yellow....

Peridot is a gem variety of the mineral olivine and serves as the birthstone for August as well as the gemstone for the 16th wedding anniversary. Along with peridot, we have included imitations of demantoid and tsavorite (natural green garnets) in the SIAMITE® yellowish-green gemstones reflections group. MATERIALS OVERVIEW The color and other physical properties of peridot are determined by the ratio of iron and magnesium in its composition, as olivine is a continuous solid solution between fayalite (Fe₂SiO₄) and forsterite (Mg₂SiO₄). Peridots with a high proportion of fayalite (iron) exhibit brownish green, olive-green, and yellow-green colors. As the proportion...

Rubies are one of the most valuable gemstones in our planet. Together with sapphire they are part of the corundum mineral family. Ruby is the traditional birthstone for July and for the 40th wedding anniversary. The physical properties of rubies are the same as those of all corundums, whether natural or synthetic: Mohs hardness of 9, refractive index of 1.76-1.77, and specific gravity of 3.97-4.05 g/cm³. SIAMITE® ruby reflections are significantly inferior to corundum in all three parameters, with values of 7.5, 1.62-1.63, and 3.0-3.3, respectively. However, other ruby imitations, such as optical or crystal glasses, cubic zirconium, and others,...

Emerald is a distinctly green gem quality variety of the beryl mineral family, which is traditionally associated with the birthday month of May and 55th anniversary. Emerald is one of the most desirable, rare and expensive gemstones and it has been the standard for green among coloured stones for thousands of years. The trend of high demand, high cost, the lack of standard pricing and a limited supply of natural emeralds, has prompted a development of synthetic emeralds and the popularity of costume jewellery at low cost, which has encouraged the use of emerald imitations. Hydrothermal synthetic emeralds and flux-grown...

SIAMITE® is lead-free and compliant with the strictest regulatory industry norms and laws regarding the restriction or prohibition of certain substances. The production process is virtually waste-free and environmentally friendly - akin to glass production, all low-quality or defective products are recycled as additives to the production charge. Energy for production comes solely from electricity, resulting in no carbon dioxide emissions into the atmosphere. As reserves of natural gems dwindle and their value increases, mining them causes irreparable damage to nature. Consumers are increasingly aware of this and are prioritizing environmentally friendly products. A notable jewelry brand recently switched from...