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(6) Check with dichroism: natural amethyst has dichroism, and false crystal has no dichroism.

One of the primary reasons homeowners opt for double glazed glass units is their remarkable energy efficiency. Traditional single-pane windows allow heat to escape during the winter and permit heat to enter during the summer, leading to increased energy consumption for heating and cooling. In contrast, double glazing minimizes heat loss in colder months and keeps your home cooler in the summer, reducing reliance on HVAC systems. This switch often results in lower energy bills, making double glazing a wise investment in the long run.