20ss Light Siam Shimmer AB – MAXIMA Crystals by Preciosa®

These 20ss (4.6mm) MAXIMA Crystals by Preciosa® in Light Siam Shimmer AB are our most popular size rhinestone—delivering vivid red color enhanced by a subtle shimmer AB coating. Precision-cut and made in Europe, these crystals offer brilliance, durability, and an elegant, soft Aurora Borealis glow that makes them ideal for luxury hand-crafted designs.

Why You'll Love Them

• Color: Light Siam (Vibrant Red)
• Effect: Shimmer AB – lighter, more ethereal than standard AB coating
• Size: 20ss (4.6mm) – our most popular rhinestone size
• High-precision faceting for maximum sparkle
• Made in the historic Crystal Valley of Bohemia by Preciosa®

Packaging Options

• Best Value: 10 Gross Pack (1,440 pieces)
• Also Available: 1 Gross Pack (144 pieces)

What is Shimmer AB?

The MAXIMA AB coating features a delicate, lighter Aurora Borealis (AB) coating similar to the popular "Shimmer" effect previously introduced by Swarovski. Unlike the traditional, heavier AB coating, the MAXIMA AB coating, which we refer to as “Shimmer AB” provides a more subtle yet equally brilliant luminosity, allowing the inherent beauty of the underlying crystal color to shine through with an ethereal glow.

About MAXIMA Crystal by Preciosa

MAXIMA Crystal by Preciosa is the highest quality European branded crystal available—the leading premium crystal for luxury, hand-crafted custom creations. This is Preciosa’s most refined line of rhinestones, offering exceptional brilliance, consistency, and performance across all applications.

Preciosa is a global leader in crystal manufacturing, with a heritage of craftsmanship rooted in the Crystal Valley of Bohemia since the 16th century. Their ethical production practices, support for artists, and long-standing commitment to excellence make them a trusted partner worldwide.

Rhinestones Unlimited is proud to be an Authorized Preciosa Partner. Our shared mission is to support artists, small businesses, and creators in dance, costuming, nails, beauty, art, and DIY. You’ll see the quality and integrity of MAXIMA crystals reflected in every project you create—through brilliance, durability, and value.

Why Choose MAXIMA for Your Projects?

• Meets the highest standards for quality and ecological certification
• Precision faceting for maximum brilliance
• Advanced cuts for superior optical performance
• Strict size and quality control for consistent sparkle
• Durable foiling and hot-fix glue technology
• Silver reflective layer for intense light return
• Premium packaging that reflects the luxury of the product
• Official brand use available for your finished creations

MAXIMA Shimmer AB Size Guide

Use the chart below to choose the ideal size for your project. Sizes are noted in "ss" (stone size), with guidance based on common use and popularity.