Here is an antique Harem ring with 4 stacking bands. The stones are early cut gemstones.

The best part of this harem ring is that it has a low profile, limiting snagging and loss of stones. The stones are set securely.

Chrysoprase: AKA Green Onyx
Weight: 6 = 0.48 cts estimated weight
Measurements: 2.5 mm
Color: bright green
Clarity: surface abrasions, eye clean
Cut: round faceted

Sapphires:
Weight: 6 = 0.40 cts estimated weight
Color: bright deep blue
Clarity: eye clean with some surface abrasions
Cut: round faceted
Measurements: 2.3 - 2.4 mm

Turquoise:
Color: blue and green
Clarity: eye visible inclusions
Cut: cabochon
Measurements: 2.5 mm

Garnets:
Weight: 6 = 0.42 cts estimated weight
Color: dark purplish red
Clarity: eye visible inclusions
Cut: round faceted
Measurements: 2.3 mm

Dimensions: 13 - 7.3 wide x 1.7 mm high off finger (each band measures 3.3 - 0.8 mm wide)
Finger Size: 6.25
Metal: 14k yellow gold
Markings: 14 on outside edge of chrysoprase and sapphire bands
Weight: 3.9 grams
Circa: 1900's or earlier based on the cut of the stones
Condition Rating: 7 (chrysoprase ring does not sit completely flush next to sapphire band, has been cleaned and stones have been checked)