Vintage Avon NV 925 Sterling Silver Mystic Topaz Bypass Ring - Size 9.25

Avon sterling silver bypass ring set with an oval mystic topaz and a round cubic zirconia at each shoulder. The center stone is an oval brilliant that shifts through violet, magenta, green and gold as the angle changes, with different facets carrying different colors at the same moment so the surface reads as a shifting field rather than one hue. Four prongs hold it, and the shank sweeps up on both sides into slim curved arms that pass the stone and cross behind it, framing the oval in an open S curve without enclosing it. A single CZ sits in a small prong setting at each shoulder where the arms begin their turn. The interior is stamped 925 and NV, the supplier code Avon used on its sterling lines.

The color is applied rather than natural, and that is exactly what mystic topaz is. Colorless topaz is cut and finished, then a metallic film measured in nanometers is bonded to the pavilion inside a vacuum chamber, and that film splits incoming light into the full spectrum before sending it back up through the crown. No natural stone produces this effect, which is why the material found an audience the moment it appeared. The open bypass mount suits it, since light reaches the pavilion from underneath and around the sides rather than being blocked by a closed setting, and the two clear CZ at the shoulders give the eye a neutral white reference that makes the center read more saturated by contrast.

Ring size 9.25. The shank carries a size 9 stamp, but the ring measures a true 9.25 on the mandrel, so the stated size is the one to go by. Arrives packaged and ready to gift or add to your collection.

Verifications:
Sterling silver has been verified using JSP Silver Testing Solution.
Mystic topaz and cubic zirconia have been verified using a Presidium Gem Tester II.

Details:
Designer: Avon
Metal: Sterling Silver
Hallmarks: 925, NV
Main Stone: Mystic Topaz
Main Stone Cut: Oval
Accent Stones: Cubic Zirconia
Accent Stone Cut: Round
Setting Style: Prong
Design: Bypass
Ring Size: 9.25 (stamped 9)
Condition: Excellent estate condition

Fun Facts:
The rainbow in mystic topaz comes from a thin film of metal bonded to the finished stone inside a vacuum chamber, a coating measured in nanometers that acts as a prism, which is why the colors shift position as the stone turns rather than staying fixed the way natural color does.
The largest faceted gemstone in the world is a topaz, the American Golden Topaz at the Smithsonian, which weighs just under 23,000 carats and took its cutter the better part of two years to finish.