High Quality Orange Aventurine and Sterling Silver Turtle Necklace and Matching Earrings. This item ships in 1-2 days. Made in the US. Aventurine quartz can help you be more self confident and optimistic. It is sometimes confused with aventurine feldspar, but feldspar occurs Orange (as this stone is) to red and has a higher level of transparency, which makes it easily distinguishable. Aventurine feldspar is sometimes referred to as ‘sunstone’, leaving the name ‘aventurine’ to refer primarily to the quartz variety. Orange Aventurine has been traded by the Vikings, the Greeks, and the natives of Oregon, US.ariety. Orange Aventurine has been traded by the Vikings, the Greeks, and the natives of Oregon, US.