मथुरा की शिल्प कला के लिए किस पत्थर का प्रयोग होता है ? - Which stone is used for the craftsmanship of Mathura? - Mathura Ki Shilp Kala Ke Liye Kis Patthar Ka Prayog Hota Hai ? UP GK in hindi, विविध Kala Patthar question answers in hindi pdf Laal Balua Patthar questions in hindi, Know About Sangmarmar UP GK online test UP GK notes in hindi quiz book Granite