هل للبلورة لون واحد ؟

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بعض البلورات لونها واحد مثل الكبريت أما المرو فهو متعدد الألوان لأنه في الأصل يحوي شوائب مختلفة . أما المرو النقي فيظهر شفافا أما إذا كان غير شفاف وبه شوائب فيظهر مرة بلون لبني أو قرنفلي أو أصفر أو أرجواني .

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