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  2. Lustre (mineralogy) - Wikipedia

    en.wikipedia.org/wiki/Lustre_(mineralogy)

    Colour change is most commonly found in alexandrite, a variety of chrysoberyl gemstones. Other gems also occur in colour-change varieties, including (but not limited to) sapphire, garnet, spinel. Alexandrite displays a colour change dependent upon light, along with strong pleochroism. The gem results from small-scale replacement of aluminium by ...

  3. Mexican amber - Wikipedia

    en.wikipedia.org/wiki/Mexican_amber

    Mexican amber is mainly recovered from fossil bearing rocks in the Simojovel region of Chiapas, Mexico. It is one of the main minerals recovered in the state of Chiapas, much of which is from 15 to 23 million years old, with quality comparable to that found in the Dominican Republic. Chiapan amber has a number of unique qualities, including ...

  4. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Recent changes; Upload file; Search. Search. Appearance. ... This is a list of gemstones, organized by species and types. Minerals ... Color (beta) Automatic. Light.

  5. What is the birthstone for January? Get to know the winter ...

    www.aol.com/birthstone-january-know-winter...

    The gemstone is mined across the globe in Namibia, Tanzania, Myanmar, Brazil, Iran, Afghanistan, Pakistan, India and Sri Lanka, according to Geological Institute of America. Garnet meaning

  6. Rhinestone - Wikipedia

    en.wikipedia.org/wiki/Rhinestone

    Historic rhinestone copy of the Florentine Diamond, made in 1865 in Paris by the L. Saemann company [1] Rhinestones on a tiara Rowenta enamel rhinestone compact. A rhinestone, paste or diamante is a diamond simulant originally made from rock crystal but since the 19th century from crystal glass or polymers such as acrylic.

  7. Iridescence - Wikipedia

    en.wikipedia.org/wiki/Iridescence

    Iridescence is caused by wave interference of light in microstructures or thin films. Examples of iridescence include soap bubbles, feathers, butterfly wings and seashell nacre, and minerals such as opal. Pearlescence is a related effect where some or most of the reflected light is white. The term pearlescent is used to describe certain paint ...

  8. Opalescence - Wikipedia

    en.wikipedia.org/wiki/Opalescence

    Opalescence or play of color is an optical phenomenon associated with the mineraloid gemstone opal, [1] a hydrated silicon dioxide. [2] This effect appears as a milky, translucent glow that changes with the angle of light, often creating a soft, pearly sheen that can display various colors or hues.

  9. Luminous gemstones - Wikipedia

    en.wikipedia.org/wiki/Luminous_gemstones

    The OED defines pyrope (from Greek Πυρωπός, lit. "fire-eyed")" as: "In early use applied vaguely to a red or fiery gem, as ruby or carbuncle; (mineralogy) the Bohemian garnet or fire-garnet"; and carbuncle or carbuncle-stone (from Latin "carbunculus", "small glowing ember") as: "A name variously applied to precious stones of a red or ...