Buddhist Scriptures:
Ushnisha Sitatapatra Mantra
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According to the Chinese Buddhism Encyclopedia: 
The holding of this mantra can eliminate castatrophy, keep you safe, purify your mind and control your desires. 
Simple Roman Phonetics:
hum ma ma hum ni sva ha
佛經：大白傘蓋佛母心咒
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依《中華佛教百科全書》：
持此咒能淨化心靈、清心淨慾，
消災第一，保平安 
簡易羅馬拼音：
hum ma ma hum ni sva ha
Product Spec 產品規格
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28mm diametre 直徑
2mm thick 厚
84 lucky grains around the coin 84粒珠子圍邊, 幸運數目
925 silver 銀
Rhodium Plated 電鍍白金
Rhodium 電鍍白色金
Two sided, same design 底面相同