Which type of glass is used in the manufacture of artificial gems, bulbs, lenses, etc?

Which type of glass is used in the manufacture of artificial gems, bulbs, lenses, etc? Correct Answer Potash-lead glass

Potash-lead glass is a mixture of potassium silicate and lead silicate. It possesses a bright lustre and has a great refractive power, hence it is used in the manufacture of artificial gems, bulbs, lenses, etc.

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