enow.com Web Search

  1. Ads

    related to: what is alexandrite used for

Search results

  1. Results from the WOW.Com Content Network
  2. Chrysoberyl - Wikipedia

    en.wikipedia.org/wiki/Chrysoberyl

    Alexandrite in sizes over three carats are very rare. Today, several labs can produce synthetic lab-grown stones with the same chemical and physical properties as natural alexandrite. Several methods can produce flux-grown alexandrite, Czochralski (or pulled) alexandrite, and hydrothermally-produced alexandrite.

  3. Synthetic alexandrite - Wikipedia

    en.wikipedia.org/wiki/Synthetic_alexandrite

    Synthetic alexandrite is an artificially grown crystalline variety of chrysoberyl, composed of beryllium aluminum oxide (BeAl 2 O 4). The name is also often used erroneously to describe synthetically-grown corundum that simulates the appearance of alexandrite , but with a different mineral composition.

  4. Alexandrite effect - Wikipedia

    en.wikipedia.org/wiki/Alexandrite_effect

    Alexandrite as it appears in daylight (left) and under incandescent light (right). The Alexandrite effect describes the phenomenon of light-induced colour changes in certain minerals. The effect was named after the alexandrite mineral, but it is also used to refer to similar processes in other minerals. The effect is thought to be caused by a ...

  5. June Actually Has 3 Birthstones—Here's What They Are ... - AOL

    www.aol.com/june-actually-3-birthstones-heres...

    And alexandrite, the second of June's modern birthstones, "can be yellowish, brownish, grayish, or blueish green in daylight and orangy or brownish red to purple red in incandescent light ...

  6. Lustre (mineralogy) - Wikipedia

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

    Alexandrite displays a colour change dependent upon light, along with strong pleochroism. The gem results from small-scale replacement of aluminium by chromium oxide, which is responsible for alexandrite's characteristic green to red colour change. Alexandrite from the Ural Mountains in Russia is green by daylight and red by incandescent light ...

  7. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    Certain synthetic color-change sapphires have a similar color change to the natural gemstone alexandrite and they are sometimes marketed as "alexandrium" or "synthetic alexandrite". However, the latter term is a misnomer: synthetic color-change sapphires are, technically, not synthetic alexandrites but rather alexandrite simulants .

  8. Active laser medium - Wikipedia

    en.wikipedia.org/wiki/Active_laser_medium

    Laser rods (from left to right): Ruby, Alexandrite, Er:YAG, Nd:YAG The active laser medium (also called a gain medium or lasing medium ) is the source of optical gain within a laser . The gain results from the stimulated emission of photons through electronic or molecular transitions to a lower energy state from a higher energy state previously ...

  9. Birthstone - Wikipedia

    en.wikipedia.org/wiki/Birthstone

    In 1912, to standardize birthstones, the (American) National Association of Jewelers (now called Jewelers of America) met in Kansas and officially adopted a list. [1]: 317 The Jewelry Industry Council of America updated the list in 1952 [3]: 311 by adding Alexandrite for June, citrine for November and pink tourmaline for October.

  1. Ads

    related to: what is alexandrite used for