What are these rocks/gems

[Sir_Opalite]

My aunt gave me these rocks(gems) and I am curious to find out what they are... could someone please tell me what they are as she doesn't remember what they are herself

 

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[Sir_Opalite]

The yellow one is some what see-through

 

[Geochem]

Sir, please take photos in bright lighted location. Like outdoors. Photos at different angles and closeup's.

 

[Haylow80]

So that top one doesn’t look like a saphire?