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Year 3 Issue 4-- June 2004
About Opals
Features of each Kyocera Created Opal
Create Opals
 
 
       
    Kyocera synthetic opals created quality equals nature
 
   It is said that opal is one of stones preferred by Japanese women, and is easy to coordinate with clothing regardless of whether it is in Japanese or Western style.

   Natural opals are prone to cracks, so there is demand in the market fir a stable supply of good quality opal for jewelry. Due to the structure of the gem, there limitations
With the design, so until now, it tended to be a standardized, monotonous product as a fashion item compared to other jewellery.

   Kyocera deveped Created Opal ( in 1980 ), Created Black Opal ( in 1984 ), Created Fire Opal ( in 2001) and Created White Opal ( in 2001 ).Each quality Kyocera created opal allows a wide range of designs, and since it has a beautiful hue and translucence at the same time, it provides diverse expressions as jewellery.

Created Opal(1980)
   About Opals
 

   Most gems are minerals consisting of crystal, but opal is amorphous, having no crystal structure. Natural opals are formed though deposition in underground layers rich in silicon dioxide (Si02). Millions and millions of minute particles of silicon dioxide containing a little moisture are closely packed and aligned, and then hardened in a certain sequence just as jelly sets, to form an opal. The opal’s unique, iridescent sparkle results from the correlation between the sequence and light of the particles.
Features of each Kyocera Created Opal

   Each Kyocera created opal has almost the same chemical,physical , and optical characteristics as those of natural opal made by hydrothermal solutions in the earth.
Created Opal(2001)
    1. Play of color
   The charm of opal is the irisdescent prism,which appears in the stone as if a variety of colors,such as blue,green, red and purple, were interacting with each other.This phenomenon is called “play of color,”which happens as light is refracted and reflected through the regularly-arraged structure of minute particles.high-quality patterns appear in each Kyocera created opal.
Created Opal(1984)
    2. Transparency
 
   An important element of the beauty is a balance between the transparency of the minute particles that create the refraction and reflection of light and the play of color made by the prism of light.Normally,the greater thetransparency, the less the play of color,but each Kyocera Create Opal has the two contrary elements and provides sparkles of high quality.
Created Opal(2001)
    
 3. High quality
   The created opal is more weather-resistant than natural opal and has almost none of the internal inclusions found in natural stones. Featuring a high level of quality. The surface can be polished so smoothly because of the splinterless,high quality opal created.

   Kyocera created opals and Kyocera Inamori Stones are marketed as loose stones worldwide.The Kyocera lines of finished jewellery products are marketed exclusively in Japan.

  
Created Opal
Item Created Opal Natural Opal
Chemical Characteristics Chemical composition SiO2-nH2o SiO2-nH2o
X-ray diffraction Amorphous Amorphous
Spectroscopic analysis Same as natural stone Light absorption specific to Opal
Physical Characteristics Crystal system Amorphous Amorphous
Hardness(Mohs') 5.0 to 6.5 5.0 to 6.5
Specific gravity 1.90 to 2.23 1.90 to 2.20
Optical Characteristics Transparency Transparent to semitransparent Transparent to semitransparent
Refractive index 1.440 to 1.465 1.440 to 1.465
Ultraviolet test Long wave length)Dark blulish violet to inactive Long wave length)Dark blulish white to inactive
Short wavelength)Light blue to inactive Short wavelength)Light blue to inactive
Specific effect Play of color Play of color
 
 Created Black Opal
Item Created Black Opal Natural Black Opal
Chemical Characteristics Chemical composition SiO2-nH2o SiO2-nH2o
X-ray diffraction Amorphous Amorphous
Spectroscopic analysis Same as natural stone Light absorption specific to Black Opal
Physical Characteristics Crystal system Amorphous Amorphous
Hardness(Mohs') 5.0 to 6.5 5.0 to 6.5
Specific gravity 1.95 to 2.23 1.98 to 2.20
Optical Characteristics Transparency Semitransparent to opaque Semitransparent to opaque
Refractive index 1.440 to 1.465 1.435 to 1.455
Ultraviolet test Long wave length)Dark blulish violet to inactive Long wave length)Strong blulish white to inactive
Short wavelength)Light blue to inactive Short wavelength)Weak blue to inactive
Specific effect Play of color Play of color
 Created Fire Opal
Item Created Opal Natural Fire Opal
Chemical Characteristics Chemical composition SiO2-nH2o SiO2-nH2o
X-ray diffraction Amorphous Amorphous
Spectroscopic analysis Same as natural stone Light absorption specific to Fire Opal
Physical Characteristics Crystal system Amorphous Amorphous
Hardness(Mohs') 5.0 to 6.5 5.0 to 6.5
Specific gravity 1.95 to 2.23 1.90 to 2.20
Optical Characteristics Transparency Transparent to opaque Transparent to semitransparent
Refractive index 1.430 to 1.455 1.430 to 1.455
Ultraviolet test Long wave length)Dark blulish violet to inactive Long wave length)Strong blulish white to inactive
Short wavelength)Light blue to inactive Short wavelength)Weak blue to inactive
Specific effect Play of color Play of color
 
Created White Opal
Item Created Opal Natural Opal
Chemical Characteristics Chemical composition SiO2-nH2o SiO2-nH2o
X-ray diffraction Amorphous Amorphous
Spectroscopic analysis Same as natural stone Light absorption specific to White Opal
Physical Characteristics Crystal system Amorphous Amorphous
Hardness(Mohs') 5.0 to 6.5 5.0 to 6.5
Specific gravity 1.90 to 2.23 1.90 to 2.20
Optical Characteristics Transparency Semitransparent Semitransparent
Refractive index 1.440 to 1.465 1.440 to 1.465
Ultraviolet test Long wave length)Dark blulish violet to inactive Long wave length)Strong blulish white to inactive
Short wavelength)Light blue to inactive Short wavelength)Weak blue to inactive
Specific effect Play of color Play of color