Synthetyc GLASS-CERAMIC Gemstones

Manufactured in Thailand

HIGH-QUALITY LAB-CREATED GEMSTONES FOR JEWELRY

A NEW GENERATION OF GLASS-CERAMIC MATERIAL

NANO-CRYSTAL FOR JEWELRY

Nano-Crystal is an advanced glass-ceramic material produced by controlled crystallization of glass.

The controlled crystallization process creates a fine crystalline structure within the glass matrix, combining selected optical characteristics of glass with the mechanical and thermal properties of glass-ceramics.

The result is a material designed specifically for applications where color, optical appearance, thermal stability and durability are important.

SAFTY AND RESPONSIBLE PRODUCTION

AKNTAL Nano-Crystal is produced using controlled formulations designed to avoid intentionally added cadmium, lead, arsenic, and other restricted hazardous substances.

ONE MATERIAL — MANY POSSIBILITIES

Nano-Crystal offers a broad range of possibilities for jewelry manufacturers, designers and stone cutters.

Color

We can develop a wide variety of colors and saturation levels, including:

Transparent
Semi-transparent
Translucent
Opaque
Light and pastel shades
Medium and saturated colors
Deep and dark shades
Special optical effects

For many colors, different saturation levels can be produced, from Extra Light (EL) and Light (L) through Medium (M) and Dark (D) to Very Dark (VD) and Super Dark (SD).

This allows designers to select the appropriate appearance for both small and large faceted stones.

NANO-CRYSTAL GLASS-CERAMICS

HIGH-STRAIN-POINT GLASS-CERAMIC MATERIAL FOR JEWELRY

Capture the Beauty of Color

AKNTAL CO., LTD.

Manufactured in Thailand since 2012.

AKNTAL develops and produces Nano-Crystal Glass-Ceramics for the jewelry and decorative industries.

Our experience in glass-ceramic materials and color development allows us to produce a wide range of transparent, translucent and opaque materials in more than 100+ colors and shades.

From delicate pastel tones to deep, saturated colors, Nano-Crystal can be developed for a wide variety of jewelry designs and applications.

CONSISTENT COLOR

One of the important advantages of manufactured glass-ceramic material is the ability to achieve consistent color throughout the material.

Controlled production conditions allow us to maintain repeatability between production batches and provide stable color development for jewelry manufacturers.

This is particularly important when producing matching stones, repeated designs and larger jewelry collections.

OPTICAL AND PHYSICAL PROPERTIES

Typical properties of our Nano-Crystal Glass-Ceramics include:

Property Nano-Crystal Glass-Ceramic

Hardness Approximately 7–7.5 Mohs

Density Approximately 2.9–3.5 g/cm³

Refractive Index Approximately 1.59–1.65

Thermal Stability High

Thermal Expansion Low

Transparency Transparent to opaque

Color Range 100+ colors and shades

Values may vary depending on the specific Nano-Crystal composition and color formulation

FROM RAW MATERIAL TO FINISHED GEM

AKNTAL works with Nano-Crystal Glass-Ceramics at different stages of production.

Depending on the customer's requirements, we can provide:

Raw material → Glass-ceramic material → Cut blanks → Faceted stones → Custom jewelry stones

Our experience in material preparation, thermal treatment, cutting and faceting allows us to understand the requirements of both material producers and jewelry manufacturers.

WHY NANO-CRYSTAL?

Wide Color Selection

More than 100 colors and shades for creative jewelry design.

Stable Color

Controlled production provides excellent batch-to-batch color consistency.

High Hardness

Typical hardness of approximately 7–7.5 Mohs provides good durability for jewelry applications.

Low Thermal Expansion

Low thermal expansion helps improve resistance to thermal stress.

High Thermal Stability

Selected compositions can withstand demanding thermal processing conditions.

Flexible Appearance

Available from transparent and translucent to opaque.

Custom Development

Colors, transparency and material properties can be developed for specific applications.

THERMAL STABILITY

Nano-Crystal Glass-Ceramics are designed to provide high thermal and mechanical stability.

Their low thermal expansion and resistance to thermal shock make selected Nano-Crystal compositions suitable for applications involving elevated temperatures, including certain lost-wax jewelry casting processes.

The suitability of a particular color and formulation should be evaluated according to the customer's casting temperature, investment material and production process.

LOST-WAX CASTING OF JEWELRY

Nano-Crystal can be used in jewelry manufacturing where resistance to thermal stress is required.

Compared with conventional decorative glass materials, specially developed glass-ceramic compositions can provide improved resistance to thermal conditions encountered during jewelry production.

This makes Nano-Crystal an interesting material for:

Lost-wax casting
Jewelry components
Decorative stones
Faceted gemstones
Cabochons
Custom jewelry designs
Artistic and architectural applications

DESIGNED FOR FACETING

Nano-Crystal can be supplied as raw glass-ceramic material for further processing or as finished stones, depending on the project.

The material can be processed into different shapes and sizes, including:

Faceted gemstones
Cabochons
Custom cuts
Decorative elements
Small precision-cut stones

Our production capabilities allow us to work with both standard and custom requirements.

MORE THAN 100 COLORS

Color is one of the most important characteristics of Nano-Crystal.

By carefully selecting the glass composition, crystallization conditions and colorants, a wide spectrum of visual effects can be achieved.

Different metal oxides and selected rare-earth elements can be used to modify the final color and optical appearance.

This provides designers with considerably more freedom than working with a limited selection of naturally occurring gemstones.

NANO-CRYSTAL VS. COMMON MATERIALS

Nano-Crystal occupies an interesting position between conventional glass and harder gemstone materials.

Its combination of color flexibility, optical properties, hardness and thermal stability makes it suitable for applications where conventional glass may not provide sufficient performance.

Material Hardness (Mohs) Density (g/cm³) Refractive Index

Nano-Crystal GC 7–7.5 2.9–3.5 1.59–1.65

Common Glass 5–5.5 2.2–2.6 1.45–1.52

Quartz 7 2.65 1.54

Topaz 8 3.56 1.61–1.63

Tourmaline 7–7.5 2.8–3.3 1.61–1.67

Spinel 7.5–8 ~3.6 1.72

Corundum 9 ~4.0 ~1.76–1.77

Natural gemstone values vary according to composition and variety. Nano-Crystal values depend on the specific formulation.

W E L C O M E
T O O U R S I T E

AKNTALGEMS.COM

NANO-CRYSTAL GLASS-CERAMIC
C R E A T E D F O R C O L O R
D E S IG N E D F O R JEWELRY

AKNTAL CO., LTD.

Manufactured in Thailand since 2012.

AKNTAL combines glass-ceramic material development with practical experience in jewelry stone production.

We work with customers who require:

Specific transparency
Custom colors
Special shades
Faceted stones
Cabochons
Custom sizes
Raw material
Production quantities

Whether you need a single custom color or a stable material for regular production, we can work with you to develop the appropriate Nano-Crystal solution.