What makes tantalum more rare that Gold?

What makes Tantalum so rare compared to Gold?

[{"selector":"#anim-7d133581-cd6e-4799-b229-b3731abd9efe [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(53.36605744557913%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] Tantalum, a rare, very hard transition metal, does not occur naturally in metallic form.

[{"selector":"#anim-b17c7cbf-77a2-4162-8b29-b8fa7f53b2d2 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(21.874999829338595%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] The estimated average abundance of tantalum in Earth's crust is about 2 parts per million (or 0.0002%)

[{"selector":"#anim-d8610657-e164-4fc7-b6b0-ef022281b804 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(21.874999829338595%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] Tantalum is a very hard and durable metal. With a mohs hardness of 6.5 it is harder than Gold (2.8 to 4.0) and will resist scratching more than any precious metal.

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