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Are there diamonds, peridot and sapphire in the igneous rocks?
  
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Hook111111




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PostPosted: Apr 22, 2018 03:27    Post subject: Are there diamonds, peridot and sapphire in the igneous rocks?  

Are there diamonds, peridot and sapphire in the igneous rocks?
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Riccardo Modanesi




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PostPosted: Apr 23, 2018 02:32    Post subject: Re: Are there diamonds, peridot and sapphire in the igneous rocks?  

Hi to everybody!
Kimberlite is the typical mother-rock for diamond and often garnet, and olivine are seen together with it (sometimes as inclusions also!). Sapphire... I don't think so. It's a more typical gemstone of metamorphic origin, not igneous.
Greetings from Italy by Riccardo.

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Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo.
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Jesse Fisher




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PostPosted: Apr 23, 2018 12:00    Post subject: Re: Are there diamonds, peridot and sapphire in the igneous rocks?  

Peridot is the gem trade name for minerals of the olivine group (Mg-rich forsterite and Fe-rich fayalite). Forsterite is commonly found in many basalts and related igneous rocks. Zabargad (St John's Island) in the Red Sea off the coast of Egypt is a classic location for well-formed crystals.
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