Basically a jigsaw puzzle for people with tweezers and saintly patience.
A micromosaic is a tiny picture made from hundreds, sometimes thousands, of slivers of colored glass set side by side. From arm's length it can look like a painting. Up close, you can see every little piece.
How micromosaics are made
The maker starts with colored glass that has been melted and pulled into thin rods or threads. Those threads are snipped into tiny pieces called tesserae, and each one is set by hand with tweezers into a soft cement, usually inside a frame of glass, stone or metal. The finest antique examples pack well over a thousand tesserae into a single square inch.
Where they came from
The craft grew out of the Vatican's mosaic workshop in Rome, where artisans made large glass mosaics for St. Peter's Basilica. In the late 1700s, Roman mosaicists shrank the technique down to jewelry size. Giacomo Raffaelli, who showed his miniature mosaics in Rome in 1775, is usually given the credit.
The timing was perfect. Wealthy travelers were pouring into Italy on the Grand Tour, and a brooch showing the Colosseum or St. Peter's Square was the ideal souvenir to carry home. The early 1800s are considered the golden age of micromosaic jewelry.
What they show
Antique micromosaics often picture Roman ruins and landmarks, doves, flowers, dogs, butterflies and religious subjects. Later pieces lean heavily toward flowers.
Micromosaic or pietra dura?
The two are often confused. A micromosaic is built from many tiny pieces of glass. Pietra dura, the mosaic style associated with Florence, is made from larger slices of polished stone, each cut to shape and fitted together like a puzzle, usually flowers on a black background. If you see lots of tiny glass bits, it's micromosaic. If you see a few smooth stone shapes, it's pietra dura.
Antique or vintage?
Italian workshops kept making mosaic jewelry for travelers through the 20th century, and those are the pieces you're most likely to find today. Some general differences:
- Antique pieces have very small, tightly packed tesserae, fine shading and detailed scenes. They're often set in black glass or stone with a gold or silver mount.
- Vintage souvenir pieces usually have larger, chunkier tesserae, bright floral designs and gold-tone or brass frames, and many are marked Italy on the back.
Both are handmade and both are collectible. The antique ones are much rarer and more valuable.
What to look for
- Missing pieces. Look closely for gaps where tesserae have fallen out.
- Tight, even work. The smaller and closer the pieces, the better the quality.
- Cracks in the background or frame, and signs of glue from a repair.
- A mark or signature on the back, which is uncommon but a real plus.
Caring for a micromosaic
Micromosaics are more fragile than they look. Keep them dry, since water can loosen the cement that holds the glass. Never soak one or put it in an ultrasonic cleaner. Dust it with a soft dry brush and store it where it won't get knocked.
Shop vintage brooches
When we find a mosaic piece, it lands in our vintage brooches and new arrivals. Every piece is one of a kind.
Keep browsing:
Vintage brooches →All vintage jewelry →New arrivals →
Keep reading: What Is Enamel Jewelry? · Cameo Materials Guide · What Is Damascene Jewelry?
Have you ever spotted a micromosaic at an estate sale or in a family jewelry box? Tell us what tiny picture it showed.
Image: illustration of a Grand Tour style micromosaic brooch.