Onyx
Grace McDonald
General Information
Onyx is a variety of layered chalcedony (a silica composed of fine intergrowths of quartz and moganite. This stone is translucent and has a vitreous and silky luster.
The most popular color or onyx is either black or white, but the stone can be essentially any color.
The production of black or other colors of onyx consists of soaking or boiling chalcedony in sugar solutions and then chemically treating those solutions.
Onyx is a porous as soft stone, meaning it is very fragile and stains easily. It is commonly used for headstone carvings and jewelry, but has become increasingly popular in design.
Environmental Impact
Natural stone contains no harmful chemicals or toxins, and regionally manufacture onyx reduce greenhouse gas emissions during transportation.
Natural stone has essentially an infinite longevity, so once it is applied to an interior setting, it almost will never have to be replaced.
Onyx can be reformed and restored for reuse as retaining walls, paving, mosaic floors or exterior facades for example.
Use in Interior Setting
1. This dining room area uses onyx as a backdrop and brightens up the space with its contrast to the dark chairs.
2. Onyx stone can be made into a variety of colors, making it aesthetically pleasing to any interior vibe a client wants
3. Honey Onyx is a popular color for commercial interiors and bar spaces.
4. Since onyx is a relatively soft stone, it can be used as decorative dishware or sculptures, creating a natural and uncut look.
Interior Application
A limestone countertop can come in many different finishes. Common finishes for onyx include a honed finish or sandblast finish. A polished finish would be used for a glossy surface. A countertop with a rough edge profile would give a rustic, unfinished feel.
Testing Organizations:
Natural Stone Council - https://naturalstonecouncil.org/
Onyx Stone Construction PLC -https://www.developmentaid.org/#!/organizations/view/248146/onyx-stone-construction-plc
Relevant standards through ASTM:
ASTM E1269. Standard Test Method for Determining Specific Heat Capacity by Differential Scanning Calorimetry
ASTM F2873 - 20. Standard Practice for the Installation of Self-Leveling Underlayment and the Preparation of Surface to Receive Resilient Flooring
