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ગુજરાતીहिन्दीಕನ್ನಡമലയാളംதமிழ்తెలుగు
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Clay

Ancient Mayans used rare clay to make blue pigment
Washington, April 21 (ANI): In a new research, scientists have determined that the ancient Maya civilization used a rare type of clay called "palygorskite" to produce Maya blue, a unique bright blue to greenish-blue pigment....