Emeralds are precious gemstones known for their rich green color, primarily composed of beryllium aluminum silicate (BeAlSiO) with traces of chromium and vanadium giving them their distinct hue.
Key Properties:
Color: Deep green to bluish-green
Hardness: 7.5-8 on the Mohs scale
Transparency: Transparent to opaque
Luster: Vitreous (glassy)
Formation: Found in hydrothermal veins and pegmatites, often in association with quartz and feldspar.
Common Applications:
Jewelry- Used in rings, necklaces, earrings, and bracelets as a luxury gemstone.
Collectors & Investments -High-quality emeralds are valuable and sought after as investment pieces.
Industrial Use - Synthetic emeralds are used in optical instruments and lasers.
Spiritual & Healing Beliefs - Some believe emeralds bring luck, wisdom, and emotional balance.
Product Grades:
Emeralds are graded based on color, clarity, cut, and carat weight (the "Four Cs"):
AAA Grade (Gem-Quality) -Deep green, high clarity, few inclusions, very valuable.
AA Grade - Slightly lighter green with minor inclusions, still premium quality.
A Grade â?? More visible inclusions, slightly lower saturation but still used in fine jewelry.
B/C Grade -Noticeable inclusions, lighter or uneven color, often used in lower-end jewelry.
Industrial Grade -Synthetic or heavily included stones, used in optical applications and lasers.
Price per Carat/Ton:
Emerald pricing varies significantly based on quality and origin:
Low-Quality (Industrial): $10â??$100 per carat
Mid-Quality (Commercial): $100-$1,000 per carat
High-Quality (Gem-Grade): $1,000-$100,000+ per carat (Colombian, Zambian, or Brazilian origin)
For bulk purchases (by ton), raw emerald ore or lower-grade material is priced differently, depending on clarity, color, and market demand. Would you like assistance in finding specific suppliers or current market rates?
Key Specifications/ Special Features:
Product Description
High Carbon Graphite Carbon Raiser GPC is mainly used for metallurgy & foundry, it can improve the carbon content in steel-melting and casting, Also High Carbon Graphite Carbon Raiser GPC can increase the quantity of scrap steel and reduce the quantity of pig iron, or use no scrap iron at all. High Carbon Graphite Carbon Raiser GPC  also can be used for brake pedal and friction material.
F.C90-99.5%S0.05-0.5%
Ash0.3-5%Moisture0.5-5%
V.M0.1 - 1%Size0-1mm, 1-5mm, 3-6 mm. 3- 10mm
Product name: Graphite petroleum coke
Other Name: graphitized petroleum coke/Artificial Graphite/Sythentic graphite/graphite granules
Size: 0-1mm,1-5mm,3-6mm,3-10mm
Regular Package: 25 kg small bags into ton bags
Appearance: Black Particles
Spec of graphite petroleum coke
Model NoC(?¥%)S(?¤%)Moisture(?¤%)Ash(?¤%)Volatiles(?¤%)N(?¤PPM)
SID-G0498.50.30.5Â Â Â Â 0.80.7---
SID-G0398.50.050.50.80.7300
SId-G02990.050.50.50.5250
SID-G01990.030.30.50.5200
Remark:
 -High percentage of carbon: Carbon content is higher than 98.5%
-Low sulphur: Sulphur content of high-level recarburiser can reach 0.01%-0.05%.
-Low nitrogen : Nitrogen content is between 80PPM and 250PPM
-High absorptivity : The absorption rate can be as high as 95%. Comparing with the same type of graphitized carburizer, the absorption speed of our product is much faster.
-High graphite crystal nucleus and high graphitization degree
Graphite petroleum coke uses
 Graphite petroleum coke is widely used in precision castings ,steel smelting works, as carbon raisers, It's also used in foundries as modifying agent to increase the quantities of speroidal graphite or improve the structure of gray iron casting thus upgrade the class of gray iron casting
