Gemstones have many characteristics that can be used as a basis for identification. When testing and identifying a gemstone, first observe its color, luster and crystal form, and then measure the hardness, relative density, and streaks. Testing these features is mostly carried out in the field. When conditions permit, the cleavage and fracture of gem minerals should also be tested.
The first is Hardness:
Hardness refers to the ability of a gemstone to resist scratching. In 1812, the Austrian mineralogist Frederick. FriedrjchMohs (FriedrjchMohs) proposed a practical classification table for the hardness of minerals. He will be able to obtain high-purity 10 kinds of common mines, arranged in order according to the size of each other’s ability to resist scribing. This set of relative hardness standards is divided into 10 levels, ranging from the least hard talc to the hardest diamond. High-grade minerals (gems) can be carved with low-grade minerals (gems), such as topaz with a grade of 8, and quartz with a grade of 7 but not corundum with a grade of 9. The Mohs hardness tester is designed accordingly. Mohs hardness only indicates the relative hardness of minerals, not absolute hardness.
The second is Cleavage:
Cleavage refers to the way in which minerals split along certain weak surfaces, which are usually in the direction of the weakest atomic chemical bond or between atomic layers. Although the cleavage surface is very flat and reflects light uniformly, it is not as smooth as the crystal surface. The degree of cleavage can be complete, clear, unclear and uncleavable.
The third is Fracture:
Hit the ore or gemstone with a hand hammer, it will break, ;, and reveal the uneven rough surface, this is the fracture. The most common is the shell-shaped fracture, which is named because its shape is very similar to the concave shape of the shell; the other type of fracture is the jagged fracture, which refers to the uneven and jagged fracture surface that appears during the fracture. In addition, there are flaky, needle-shaped, and soil-shaped fractures.
The fourth is Tenacity
Toughness refers to the ability of a gemstone to resist wear, stretch and compression. The toughness of a gemstone means that it is difficult to break. For example, the structure of jade has two types: the granular metamorphic structure of jadeite and the fibrous metamorphic structure of nephrite. Although its hardness is not too high, it is not easily broken due to its high toughness.
The fifth is relative density (Relative Density). Measuring the relative density of gemstones is very important for its classification and identification.
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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