Revelation 21:15

The fact that the angel’s measuring rod was gold reflects the dignity of the task of measuring this city’s gate-towers and walls (cf. Ezekiel 40:3). Again, the temple that Ezekiel described being measured in Ezekiel 40-43 is the millennial temple, which seems clear from the contexts and the differing measurements. Only the utensils used in the holy of holies were gold in the tabernacle and temple, but even this measuring rod is gold, suggesting the high value of the city.