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Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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Road West, North Branch, Jingkai Road, Puyang City

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Old Mine Cut Diamonds – What They Are & What To Know
Old Mine Cut Diamonds – What They Are & What To Know

Old mine cut diamonds are mostly 10% to 15% less expensive than the old European cuts. You can get a low-grade 0.40 carat for only $300 or an elegant 2 carat for $5,500. Until recently, old mine cut diamonds and other antique diamonds are being sold at a marginally lower price than modern cut diamonds.

Diamond cut - Wikipedia
Diamond cut - Wikipedia

Older ,diamonds cut, before ca. 1900 were ,cut, in "primitive" versions of the modern round brilliant, such as the rose ,cut, and old ,mine cut, (see History section). Although there is a market for antique stones, many are recut into modern brilliants to increase their marketability.

History of Vintage Old Mine Cut Diamonds | Behind the 4cs ...
History of Vintage Old Mine Cut Diamonds | Behind the 4cs ...

Old Mine Cut,: The ,Old Mine Cut, was developed during the Industrial Revolution in Europe when ,diamonds, were discovered in Brazil and major advances in diamond cutting were becoming prevalent. This is the earliest design of a Brilliant ,Cut, stone with a soft cushion shape. ,Old Mine Cut diamonds, have high crowns, small tables, deep pavilions, and 58 facets.

Old Mine Cut and Old European Cut Diamonds | EraGem
Old Mine Cut and Old European Cut Diamonds | EraGem

Old Mine cut diamonds or “Miner Cut” were used in Victorian and Edwardian Eras. There is some overlap between the periods when both antique diamond cuts coexisted. Transitional Cut diamonds were the common cut in the 1940's. Diamond cutting and technology advanced quickly …

Antique Diamond Cuts: What You Need to Know | The Diamond Pro
Antique Diamond Cuts: What You Need to Know | The Diamond Pro

2/11/2020, · Old mine cut diamonds first appeared on the jewelry scene in the early 1700s and were popular during the Georgian and Victorian eras. Their distinctive shape is a result of jewelers aiming to minimize the loss of the rough diamond and maximize carat weight.

Old Mine Cut Vs. Old European Cut Diamonds: Can You Choose ...
Old Mine Cut Vs. Old European Cut Diamonds: Can You Choose ...

The table of Old Mine Cut stones were relatively smaller to that of modern stones, i.e., 30 – 40% smaller. However, the table of most Old European Cut diamonds were even smaller, approximately about 60% smaller than that of a modern diamond. Crown. The crown of Old Mine Cuts were large in comparison to today’s standards.

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Road West, North Branch, Jingkai Road, Puyang City