[DOC] [TLE] J! Archive - Show #1890, aired 1992-11-20 [PAR] The two types of these home-signaling devices are photoelectric & ionization ... 
The harlequin type of this gem is characterized by angular patches of fire... [DOC] [TLE] Ask Me A Trivia Question -- 2 -- - Discussion on Topix [PAR] May 2, 2011 ... After emerald, this blue-green gem is the most highly prized of the ... The 
harlequin type of this gem is characterized by angular patches of fire. [DOC] [TLE] Opal Quality Factors - GIA [PAR] This fire opal weighs a spectacular 132 carats. ... As diverse as snowflakes or 
fingerprints, each gem can differ noticeably. ... Opals are often divided into types 
based on background color. ... Pinfire or pinpoint: Small, closely set patches of 
color; Harlequin or mosaic: Broad, angular, closely set patches of color; Flame:... [DOC] [TLE] On the Origin of Digit Patterns in Gem Opal | Gems & Gemology - GIA [PAR] Although polygonization in the form of vertical columns is a growth process 
typical ... black, gray, brown, yellow to orange (as in fire opal), red, pink, blue, 
green, or violet. ... As defined earlier, digits are characterized by their shape and 
revealed by ... In this unusual 23.83 ct opal from Wollo, Ethiopia, play-of-color 
patches are... [DOC] [TLE] What's the birthstone for October? | Earth | EarthSky [PAR] Oct 1, 2015 ... ... ground dissolves silica that eventually precipitates to form the opal, sometimes 
... Perhaps the most valuable opal pattern is the harlequin, large angular 
patches of red, ... In the United States, brilliant fire opals are also found in Nevada
. ... The alternate birthstone for October is the tourmaline, a gemstone... [DOC] [TLE] Classic Rocks and Gems - Timeline | Facebook [PAR] +49 173 5287561 ... Classic Rocks and Gems added 7 new photos. ... The fire 
and crystal opals are prone to breakage, while the white, ... deposition of a 
homogeneous opal layer and subsequent polygonization in the form of vertical 
columns; .... In this unusual 23.83 ct opal from Wollo, Ethiopia, play-of-color 
patches are not... [DOC] [TLE] http://www.royalgemplaza.com - Opal [PAR] The description of all kinds of Opal which are used in the gemology. ... patches in 
a wide range of color with clear-cut edges are known as harlequin opals: ... Here, 
too, when the patches are angular, polygonal, clear-cut, and of uniform size, ... 
Distinctive features: Fire opal is strongly characterized by its color, combined with
... [DOC] [TLE] Opal jewelry Dubai necklace online,opal necklace,opal rings. [PAR] Apr 22, 2014 ... Jan has carried and worn a piece of Australian fire gem during all ... of the 
highest quality, characterized by red/black galaxy pattern gems of superlative 
brilliance. ... The most valuable gemstone pattern is the harlequin, angular large 
... Solid 100% opals, no treatment of any kind $291 at wholesale prices. [DOC] [TLE] N-P Jewelry Dictionary - Esslinger Watchmaker Supplies Blog [PAR] Jun 11, 2014 ... The American Gem Society holds that a natural is not a blemish if it is ... the latter 
comprehends any kind of jewelry, strings of gems, medallions, etc., ... negative 
crystal  A characteristic inclusion of natural gems; an angular cavity ..... for fire 
opal, includes: WHITE OPAL, BLACK OPAL, HARLEQUIN OPAL,... [DOC] [TLE] Full text of "Gems & Gemology Fall 2013" - Internet Archive [PAR] 138 On the Origin of Digit Patterns in Gem Opal Benjamin Rondeau, .... "It is the 
largest hoard of its kind, dating from the very late 16th to the early 1 7th century. 
.... The Great Fire of London, as it came to be known, destroyed most of the city's 
..... In this unusual 23.83 ct opal from Wollo, Ethiopia, play-of-color patches are 
not... [DOC] [TLE] 1000+ images about Phenomenal Gemstones on Pinterest | Black ... [PAR] Black Opal - Rare Peacock Harlequin Pattern cut

Question: The harlequin type of this gem is characterized by angular patches of fire
Answer: opal