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Ruby and Pearl

Ruby and Pearl

It must be known that both ruby (yakut) and pearl (marjan) are the Koranic terms, having natural colours of red and green respectively. Ruby is a transplant red gemstone variety of the mineral corundum. Rubbies vary in colour from pale to deep red, also called the pigeon blood. On the other hand, the pearl is a substance forming the inner layers of the shells of nacreous mollusks, as pearl-oyster, abalones, etc., having rich green colour.

Source: 
Book: Ismaili flag - It's Origin & Importance


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