The ability of a gemstone to resist mechanical action such as external pressing, scoring or grinding is called its hardness. The hardness of a gemstone is related to its crystal structure, chemical bond, and chemical composition.
The hardness of gemstones can be divided into absolute hardness and relative hardness. The absolute hardness is measured by a hardness tester under standard conditions. The relative hardness (or comparative hardness) of a gemstone (F) is the relative scoring hardness obtained by comparing with the specified standard minerals, which is the most meaningful in the identification of gemstones. The Mohs hardness tester is a qualitative level determined by the German mineralogist Friedrich Mohs in 1822 based on the relative hardness of 10 standard minerals. It is divided into ten levels, namely: talc 1, gypsum 2, calcite 3, and fluorite 4. , Apatite 5, Feldspar 6, Quartz 7, Topaz 8, Corundum 9, Diamond 10. If an unknown mineral can engrave orthoclase (Hm=6) but can be engraved by quartz (Hm=7), the Mohs hardness of this unknown mineral is between 6 and 7. In addition, the Mohs hardness of nails is 2.5, the Mohs hardness of glass is 5, and the Mohs hardness of steel blades is 5.5-6.
Mohs hardness is very helpful in gem identification. For example, when distinguishing Hetian jade and carbonate jade of the same color, the easiest way is to use a knife to mark. The one that can be marked by a knife is carbonate rock jade, and the one that cannot be marked by a knife is Hetian jade. For another example, when identifying Shoushan stone and talc, it is talc that can be scratched by nails, and Shoushan stone is not scratched. Scratch is a destructive test method, which is generally only used for testing gem materials, or testing on the inconspicuous parts of the finished gem. When conducting a hardness test, be sure to seek the opinions of customers or businesses.
For gems, the hardness is generally required to be large, so that it is not easy to wear. The main component of dust in the air is quartz. The polished surface of gemstones with a Mohs hardness of 7 and Mohs hardness less than 7 will become “hairy” and lose its original luster due to frequent impact and abrasion by dust in the air.
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OEM/ODM jewelry manufacturer design custom your own jewelry
LET’S GET STARTED : mo@kingjy.com
GuangZhou JingYing focus on custom wholesale ring necklaces bracelets earrings sterling silver 925 jewelry,sterling silver gold plated with 18K,14K,24K yellow gold,white gold and rose gold.It is able to custom sterling silver jewelry various design,logo brand or other words by laser engraving according to the customer’s requirement.
Our monthly production capacity is up to 50,000 piece bracelets necklace earrings ring jewelry.JingYing entering into a partnership with supermarkets,jewelry chain shop,outlet stores,jewelry wholesaler,traders and jewelry brand company,professional provide create customized jewelry and mass production of high quality 925 sterling silver jewelry service.
JingYing custom made silver earrings jewelry manufacturer production process
The reasons of quality guarantee of JINGYING jewelry
1. Original Designning
It begins when you bring us a design idea or sample changed ,we start original design by sketch as your request. Custom necklace manufacturer
2.Creating 3D Mold
No matter if this is a simple sketch or a full prototype, we are the Experienced and mature design team help you working on bringing it to life as a fully realized piece of jewelry.Custom 925 silver bracelet.
3.Creating Mold ( Metal Master)
We use CNC machining machine carving jewelry model ensure our jewelry goods 100% high quality sterling silver jewelry same as fine jewelry surface smooth and no lost stone .Custom earrings sterling silver manufacturer
4.Casting
Inject wax mold become plaster mold ,after High temperature heating got jewelry metal goods base. Custom made ring silver jewelry
5. Molding & Polish
Modeling jewelry goods more beautiful ,surface smooth. Custom made silver jewelry manufacturer
6. Hand Setting Gemstone
We use Micro-inlaid machine imported from Japan do setting for 5A CZ stones ,can be 99% no lost stone wax setting technology . Custom made men silver jewelry
7. Plating
We do 2-time plating for all 925 sterling silver jewelry ,first do thick silver plating by base ,double posh make sure surface smooth then go on with the real gold plating ,thickness up to 3 microns ensure can last 1years time ,we call it vermail .
8. Perfect QC Process
Quality checking is the most important process in the whole production line .we have a 10-engineer team to do quality checking control by each process .
No lost stone -1,we will use professional steel needle to beat stone one by one ,make sure no fall out .2,we will drop jewelry items at 3 meters to check the stone no fall out .
Plating- 1,customer can get the report from the machine test about the plating thickness make sure get your standard .2,we use professional tools ,manually rub the metal surface for five minutes ,ensure the coat quality is good . Custom wholesale sterling silver
9. Packaging & Shipping
Independent packaging ,or as per customer request；Express delivery by DHL ,UPS,TT
JingYing custom made silver earrings jewelry manufacturer 925 Sterling silver Manufacturer Advantage
1:20-year senior high end 925 sterling silver custom wholesale jewelry maunfacturer
2:Ten of thousands fashion jewelry customized production experience ,monthly production capacity up to 100000 pieces
3: Exquisite workmanship ,surfface smooth.
4:Efficient production,7-day sample time ,30-day mass production time
5:Quality products,does not change color, does not drop the stone, if has the product quality question in non-human reason, guaranteed 3-6 months for repair.
In the past 20 years, JingYing Jewelry has been following the aim of pursuing perfection and improving on the 925 silver jewelry technology.Our design team keeps learning and improving skill ,design fashionable, romantic accessories for feminine.Relying on exquisite design process and excellent quality, JingYing Jewelry has won the familiar and recognition of chain brands at home and abroad.
Occasion:Modern jewelry manufacture wholesale women’s jewelry custom for party and daily trendy jewelry rings for women
Jewelry custom made silver earrings jewelry manufacturer Quality Assurance :
Your jewerly designs and goods must be took pictures before shipment .check your order whether have problem .
Whatever you have any problem with custom jewerly design or mass order once you get the goods ,contact with us (mo@kingjy.com) ,can get refund if quality problems ,do business with us is in safe .
2.Creating 3D Mold
No matter if this is a simple sketch or a full prototype, we are the Experienced and mature design team help you working on bringing it to life as a fully realized piece of jewelry.Custom 925 silver bracelet.
3.Creating Mold ( Metal Master)
We use CNC machining machine carving jewelry model ensure our jewelry goods 100% high quality sterling silver jewelry same as fine jewelry surface smooth and no lost stone .Custom earrings sterling silver manufacturer
4.Casting
Inject wax mold become plaster mold ,after High temperature heating got jewelry metal goods base. Custom made ring silver jewelry
5. Molding & Polish
Modeling jewelry goods more beautiful ,surface smooth. Custom made silver jewelry manufacturer
6. Hand Setting Gemstone
We use Micro-inlaid machine imported from Japan do setting for 5A CZ stones ,can be 99% no lost stone wax setting technology . Custom made men silver jewelry
7. Plating
We do 2-time plating for all 925 sterling silver jewelry ,first do thick silver plating by base ,double posh make sure surface smooth then go on with the real gold plating ,thickness up to 3 microns ensure can last 1years time ,we call it vermail .
8. Perfect QC Process
Quality checking is the most important process in the whole production line .we have a 10-engineer team to do quality checking control by each process .
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