Table: diamond_simulants
Columns: material
formula
refractive_index_es_589_3nm
hardness_mohs_scale
density_g_cm_3
state_of_the_art

Question: What hardness has a formula of y 3 al 5 o 12?
SQL: SELECT "hardness_mohs_scale" FROM diamond_simulants WHERE "formula" = 'y 3 al 5 o 12'

Question: Which formula has a refractive index 589.3 at 1.97?
SQL: SELECT "formula" FROM diamond_simulants WHERE "refractive_index_es_589_3nm" = '1.97'

Question: How much is the density with a hardness of ~ 8.3?
SQL: SELECT "density_g_cm_3" FROM diamond_simulants WHERE "hardness_mohs_scale" = '~ 8.3'

Question: Which material has a hardness of 8.25?
SQL: SELECT "material" FROM diamond_simulants WHERE "hardness_mohs_scale" = '8.25'