Presto, chango. Like a magician's sweep of the hand, a few natural gemstones have almost magical optical properties.

They can shift or change from a range of blues to a range of purple or lilac hues.

A wave of the wand reveals this captivating, no-heat, lilac to pale blue sapphire. And no need to be a gemologist to be certain this hasn't been heated by man.

Sapphires that exhibit this beautiful flow of color are never heated; once heated, that property is negated.

From the Art Deco period, we have this striking two-tone ring set with a sapphire and with accent rose-cut diamonds. Resting low on the finger, it is truly OOAK with sweeping, open, arched sides.

Notable too is the under-gallery with hand-engraved swirls and waves that can be viewed from the north and south. It gracefully hugs the curve of the finger with pure elegance.

Note: The first photo shows the sapphire in daylight or incandescent light, the second more blue in white fluorescent light.

Details:
One natural no heat sapphire
Faceted
Set en pointe
Total estimated weight of 4.0 carats
Twelve diamonds, total of .29 carats
Sparkling and white to the eye
Color H-I, clarity SI1-3
Platinum topped 18k yellow gold
Circa 1925