Sprinkle the lamb chops on both sides with the salt, pepper, garlic powder and rosemary.
Add oil to a large cast iron or heavy steel pan on medium high heat until very hot.
Carefully put in the lamb chops and sear them for about 4 minutes (for medium rare doneness) on each side.
Cover with foil and let rest for 10 minutes before serving.
They can be cooked for more or less depending on desired doneness. Use an instant read thermometer if desired. It should read 125°F for medium rare, 130°F for medium, and 145°F and higher for well done.