@Neryl, you cracked me up when I read your post ha-ha @lakshmi17, All jokes aside, if you want to go to the trouble of having beautiful pendant lights and your ceiling is so high, get a professional!!! Save up if you have to but it's the best way to go in this case, you might be surprised that it's not as expensive as the cost of the lights you intend to have fitted. I paid over $130 for each of the three lights I have bought to have installed over my dining table and I'm darn sure my electrician won't be charging me $400 to install them!!!

If you are in New Zealand, I have often found great lights (and a big range) at Lighting Plus. When I was putting my house on the market I put three of these: http://www.lightingplus.co.nz/lighting/pendants/contemporary/jaga-bcopal-1light-pendant.html over my kitchen benchtop, and they looked just gorgeous. So gorgeous in fact, that I have already bought three new ones in advance for when I upgrade the kitchen lighting in my new house. They also have these : http://www.lightingplus.co.nz/lighting/pendants/contemporary/hudson25-whitegold-1lt-pendant.html or these: http://www.lightingplus.co.nz/lighting/pendants/contemporary/trumpet35-pendant-blackgold.html  if you like the look of the internal gold under the shade. There are also others similar. I have also found some great lights at : http://www.edenlighting.co.nz/collections/pendant-lights . All of these are very affordable. However if you want to go really high end, and you like NZ timber lights, you can't go past : https://www.davidtrubridge.com/collection/lighting/  Just my 2c. Enjoy.

I would remove the globe, then with hot soapy water wash the entire outside of glass pendant and if your hand can fit, the inside as well. Maybe even a quick spray of a cleaning product like Ajax spray and wipe to get the grease off the outside, before wiping over the entire glass pendant. Obviously you will need a ladder to stand on to reach pendant safely. Make sure the glass is room temperature, not hot.

I would call it a glass bowl hanging light. This company sells them as new replications. I'm sure yours would be worth more because it is original. https://www.fatshackvintage.com.au/products/chateau-glass-hanging-bowl-light