Assorted semi-precious gemstones are widely used in jewelry for their diverse beautyaffordability, and purported metaphysical benefits, which range from emotional balance to enhanced focus. They are sourced globally and often formed through various geological processes. 
Benefits and Jeweler Use
Semi-precious stones provide an extensive palette of colors and properties, making them highly versatile for jewelry designers. They are a popular and affordable alternative to traditional precious stones, allowing for greater experimentation in design, from minimalistic everyday wear to bold, statement pieces. 
Common uses and benefits include:
Common Assorted Gemstones, Their Benefits, and Origins
Gemstone Primary Benefits (Believed)Jeweler UseCommon Origins
AmethystPromotes calmness, reduces stress, enhances mental clarity, and aids in sleep and spiritual growth.Rings, pendants, earrings, and beads in a variety of cuts.Brazil, Sri Lanka, South Africa, Uruguay.
CitrineAttracts wealth, prosperity, and success; boosts confidence and creativity.Popular in rings and bracelets to add warmth and a sunny glow.Brazil, Spain, Madagascar, Russia.
GarnetEnergizes and revitalizes, symbolizes passion, fosters balance, and is believed to improve blood circulation.Used in signet rings, necklaces, and other pieces, often for its deep red hue.Worldwide, including India, Russia, China, Brazil, and the USA.
TurquoiseOffers protection, enhances communication and self-expression, and brings good fortune.Widely used in earrings and statement pieces, popular in Southwestern designs.Iran, Tibet, the USA, Mexico, and Afghanistan.
Rose QuartzKnown as the "Stone of Love," it encourages compassion, self-love, and healing emotional wounds.Used in feminine, delicate jewelry designs, such as necklaces and bracelets.Major sources include Brazil, Madagascar, and the USA.
Lapis LazuliAssociated with wisdom, truth, and inner power; aids meditation and mental clarity.Used in bold, deep blue jewelry pieces, often set with gold flecks.Historically sourced from Afghanistan; also found in Russia and Chile.
JadeKnown as a "lucky" stone, attracting money and promoting harmony and nurturing energy.Popular in bracelets, rings, and various decorative items.Primary sources include China and the United States.
Formation and Origin
Most semi-precious gemstones are natural minerals formed within the Earth's crust over millions of years through various geological processes, including the cooling of molten rock (igneous), heat and pressure (metamorphic), or the accumulation of minerals from water (sedimentary/hydrothermal). Organic "gems," such as amber, form from fossilized resin. The wide availability of most semi-precious stones, compared to the Big Four (diamond, ruby, sapphire, emerald), contributes to their lower price point and classification.