GST implication on non metals clad with precious metals - Goods and Services Tax - GST

This is mainly a classification query. Chapter 71 of the Tariff deals with precious metals, but seems to cover only precious metals or base metals clad with precious metals at Note 1(b). What would be the case for non metals clad with precious metals ? Such as wood clad with gold or silver ? By extension, what would be the HSN of wooden items covered with silver and sold as decorative pieces ? Given the fact that these items are sold only at jewelery shops as silver articles and the majority part of value is of silver only ? Can the essential nature test, or for that matter the commercial identity test be used to classify the same under Chapter 71 and avail the benefit of a 3% tax rate ?