They are not marked but test strong for 14k gold with acid. The large dark spot is not an inclusion, it is the large open cut culet and the diamond is shallow cut. I cannot say the color but they appear white and do not look yellow to me. These are antique cuts and are not perfect like new diamonds. All items I sell are vintage and most are antique.
I will point out any flaws that I think are pertinent but ask questions if you are unsure. Thanks so much, I appreciate your business!
The item "Small Antique Old Mine Cut Diamond Earrings Screw Safety Backs. 20 Carat" is in sale since Thursday, December 5, 2019. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Fine\Art Nouveau/Art Deco 1895-1935\Earrings". The seller is "sylvatis" and is located in Newport, Virginia.
This item can be shipped to United States.