כִּכָּ֛ר זָהָ֥ב טָה֖וֹר יַעֲשֶׂ֣ה אֹתָ֑הּ אֵ֥ת כָּל־הַכֵּלִ֖ים הָאֵֽלֶּה׃
"De um talento de ouro puro se fará isso, junto com todos esses utensílios.
Mishneh Torah, The Chosen Temple
When is the above law [that all the decorations are essential] true? When it is made of gold. However, [if it were made of] other metals, we do not make the cups, knobs, and flowers. Similarly, a golden Menorah must be one talent of gold, including the candles, and hammered out solid while [in the case of Menorahs made of] other metals we do not care about the weight, and it is Kosher even if it is hollow.