Copper
GEMATRIA:
"Copper" = 290 (Reverse Primes)
Copper's atomic number is 29
See the "29" section of this web-brain
"Yes, copper can form a crystal structure. Copper is a chemical element and it is a soft, malleable, and ductile metal with very high thermal and electrical conductivity². In its solid state, copper atoms are arranged in a regular array known as a crystal³. More specifically, copper often forms a face-centered cubic structure³.
It's interesting to note that native copper is a polycrystal, with the largest single crystal ever described measuring 4.4 × 3.2 × 3.2 cm². So while copper itself is not a crystal, it can form crystalline structures."
Source: Conversation with Copilot, 6/22/2024
(1) Copper - Wikipedia. https://en.wikipedia.org/wiki/Copper
(2) Copper - Crystal Structure - Periodic Table of Elements. https://www.periodic-table.org/Copper-crystal-structure/
(3) Copper Meanings and Crystal Properties - The Crystal Council. https://thecrystalcouncil.com/crystals/copper