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KYOCERA Introduces the New Platinum 505 Material Developed for Jewelry Use

Offering the luster, feel, and density of regular platinum

April 18, 2008

Kyocera Corporation (President: Makoto Kawamura) has succeeded in developing a new material called Platinum 505 that offers a hardness and feel on par with regular platinum material (85-100% platinum content), while at the same time keeping the platinum content down to 50.5% through the application of a casting technique developed over a period of many years. With soaring prices of rare precious metals in recent years, Kyocera has created added value in the form of low price and high quality to make high grade platinum jewelry accessible to customers, and is now pleased to announce that it will extend deployment of the material to the jewelry market.


From Saturday, April 19 of this year, Platinum 505 will go on the market in the form of a new wedding ring brand called “Hana Yukari” from Azumi Co., Ltd. (Headquarters: Nagoya, President: Gonjiro Minamimoto) which entered into an alliance with Kyocera in April 2006 to employ the new material.

Photo: “Hana Yukari” wedding rings use the new material Platinum 505
"Hana Yukari" wedding rings use the new material Platinum 505

Market Background
Platinum is a very rare precious metal due in part to the extremely low concentration normally found in the original ore, and there are few platinum producing countries in the world. Platinum exhibits almost no fading or tarnishing as a result of heat, chemicals, or oxidation, and thanks to its unique timeless feel which is immune to fashion trends it has gained steadfast popularity for use mainly in wedding rings, which are both once-in-a-lifetime keepsakes as well as items of everyday wear.


However, recent years have seen the market price of platinum soar from an average of 2,997 yen per gram three years ago to an average of 6,723 yen per gram in March of this year, more than a twofold increase.1


Kyocera has developed other unique new materials that are unrestrained by conventional limits, such as when it marketed the industry’s first pink silver in 1998. The development of this new material was made possible through the application of Kyocera’s unique casting technique for the highly sought-after metal platinum.. Not only has Kyocera achieved the strength and feel required of wedding rings made of platinum, but we have also created a high value-added material that enables us to offer the product at a low price.
1Ref.: Changes in Platinum Prices - Tanaka Kikinzoku Kogyo K.K.


Features of Platinum 505
The appeal of platinum lies in its white luster, as well as its durability, exhibiting no signs of fading or tarnishing even after many years. With the new Platinum 505, Kyocera has kept the platinum content down to 50.5% while at the same time achieving a level of hardness that is equal to material with a platinum content of 90-95%.2
By keeping the platinum content down to 50.5% while retaining color tone and durability on par with regular platinum materials, Kyocera has been able to keep the price of jewelry low, enabling us to supply a high value-added product.

Features of the PT505 material
Type of metal Vickers hardness
PT505(Pd) 100~110
PT950(Ru) 100~110
PT950(Ir) 70~80
PT900(Pd) 60~130
* PT is the abbreviation for platinum
 PT900 and PT950 are the ordinary values
* Measured by Kyocera as of April 18, 2008
2Platinum content ordinarily employed in rings