THE GEMHOOD LIBRARY
Gemstone encyclopedia
Learn about remarkable natural stones through factual guides, care advice, and their cultural and historical significance.
Agate
A banded form of chalcedony quartz used for ornamental stones and distinctive jewellery.
Read guide → Chrysoberyl (BeAl₂O₄)Alexandrite
Colour-changing chrysoberyl, typically appearing greenish in daylight and reddish in warm artificial light.
Read guide → FeldsparAmazonite
A blue-green variety of microcline feldspar used as beads and polished decorative stones.
Read guide → Quartz (SiO₂)Amethyst
Amethyst is the purple variety of quartz, appreciated for its range from gentle lilac to deep violet. Its colour and relatively good resistance to scratching make it familiar in pe...
Read guide → Beryl (Be₃Al₂Si₆O₁₈)Aquamarine
Aquamarine belongs to the beryl mineral family. Its recognisable blue to blue-green colouring often appears in delicate pendants and rings, where an open setting helps the stone ca...
Read guide → QuartzAventurine
A quartz material whose glittering effect is produced by tiny mineral inclusions.
Read guide → Barium titanium silicateBenitoite
A scarce blue barium titanium silicate notable for strong dispersion and its California history.
Read guide → ChalcedonyBloodstone
A usually dark-green chalcedony with contrasting red flecks, traditionally cut as cabochons.
Read guide → ChalcedonyCarnelian
An orange-to-red variety of chalcedony quartz frequently carved into beads and seals.
Read guide → ChrysoberylChrysoberyl
A durable mineral species that includes golden chrysoberyl, cat-eye chrysoberyl and alexandrite.
Read guide → ChalcedonyChrysoprase
An apple-green chalcedony coloured by nickel-bearing compounds, often used as cabochons.
Read guide → Quartz (SiO₂)Citrine
Citrine is a yellow to orange variety of quartz that works well with warm-toned jewellery designs. Colour can range from pale straw to deeper golden hues. The origin of an individu...
Read guide → GEMSTONEClear Quartz
Discover its jewellery history, colours and traditional symbolism.
Read guide → Carbon (C)Diamond
Crystalline carbon prized for its hardness and brilliance; natural diamonds form deep within the Earth.
Read guide → Beryl (Be₃Al₂Si₆O₁₈)Emerald
Emerald is a green member of the beryl family and one of the best-known coloured gems. Its appearance can include natural inclusions. Buyers should ask for treatment information an...
Read guide → CarbonFancy Color Diamond
Diamond with naturally occurring noticeable colour such as yellow, pink, blue or green. Colour origin and treatment must be disclosed in sales.
Read guide → Calcium fluorideFluorite
A calcium fluoride mineral with a broad range of colours; its modest hardness requires care in jewellery.
Read guide → A group of silicate mineralsGarnet
Garnet refers to a family of minerals rather than one single red gem. Different varieties can range from deep red to lively orange and green. Gemhood educational filters can reflec...
Read guide →Traditional and spiritual associations are presented for cultural interest, not as medical facts.