Ruby is an incredibly durable gemstone if there are no treatment-related durability concerns. - Courtesy Jan Goodman Co. Hardness and toughness Gem and mineral hardness is measured on the Mohs scale.

3M India Ltd., incorporated in the year 1987, is a Large Cap company (having a market cap of Rs 32,394.00 Crore) operating in Diversified sector. 3M India Ltd. key Products/Revenue Segments include ...

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