What is City of Jewels in Latin language?

There isn't a single, perfect Latin translation for "City of Jewels" because it depends on how you want to emphasize the meaning. Here are a few options, with explanations:

Formal and Literal:

* Urbs Gemmarum: This is the most direct translation, using "urbs" for city and "gemmarum" for the genitive plural of "gemma" (jewel).

* Civitas Gemmarum: Similar to "Urbs Gemmarum," but uses "civitas" instead of "urbs" to refer to the city.

More Poetic:

* Urbs Gemmifera: This uses the adjective "gemmifera," meaning "jewel-bearing," to create a more poetic and descriptive image.

* Urbs Gemmis Splendens: This uses the participle "splendens" (shining) to highlight the brilliance of the jewels.

With a Specific Jewel:

* Urbs Diamantum: This would translate to "City of Diamonds," using "diamantum" (plural of "diamond").

* Urbs Smaragdorum: This would translate to "City of Emeralds," using "smaragdorum" (plural of "smaragdus").

The best translation will depend on the context and the desired emphasis.