Mumbai, July 21 -- SML Mahindra Ltd, Gujarat Fluorochemicals Ltd, Action Construction Equipment Ltd and Archean Chemical Industries Ltd are among the other gainers in the BSE's 'A' group today, 21 July 2026.Bluestone Jewellery & Lifestyle Ltd surged 10.68% to Rs 673.45 at 11:46 IST. The stock was the biggest gainer in the BSE's 'A' group. On the BSE, 3.41 lakh shares were traded on the counter so far as against the average daily volumes of 31104 shares in the past one month. SML Mahindra Ltd soared 7.92% to Rs 4273.9. The stock was the second biggest gainer in 'A' group. On the BSE, 6121 shares were traded on the counter so far as against the average daily volumes of 8125 shares in the past one month. Gujarat Fluorochemicals Ltd spiked 6....