why my ores dont spawn on locations??

script:

local rockLocations = game.Workspace.RockLocations:GetChildren()
local numLocations = #rockLocations

for place = 1, numLocations - 1 do
	local rockClone = rock:Clone()
	rockClone.Parent = script.Parent
	rockClone.Position = rockLocations[place].Position
	rockLocations[place].Free.Value = false
end

rock:Destroy()

Try this:

local rock = script.Parent.Rock:Clone()
local rockLocations = game.Workspace.RockLocations:GetChildren() 
local numLocations = #rockLocations

rock:Destroy()

for place = 1, numLocations - 1 do 
	local rockClone = rock:Clone() 
	rockClone.Parent = script.Parent 
	rockClone.Position = rockLocations[place].Position 
	rockLocations[place].Free.Value = false 
end

all I've done is cloned the reference rock and used that clone for your rockClone variable. It looked like the code was spawning the rocks at your locations but then deleting them right after, So cloning the reference part makes a fresh/stand-alone copy of the reference part.

Hope this helps! :)