Sapphire is a gem variety of mineral corundum having any color aside from red or dark pink. In which case, it would be called ruby. The crystal habit of Sapphire is usually found massive or granular. It has no cleavage display even if evaluated closely under polarizing microscope used in the field of optical mineralogy. [...]
Peridot is commonly found colored yellow, to yellow-green, olive-green, to brownish, which can be fascinating when viewed closely under polarizing microscopes. Peridot can be also found sometimes colored lime-green to emeraldish hue. But basically this gem mineral is usually found olive green. The intensity of the green tint depends on the iron content of the [...]
Olivine is most commonly found colored yellow to yellow green which can be more fascinating when viewed closely under polarizing microscopes. The crystal habit of this gem mineral Olivine is usually found massive to granular when evaluated under petrographic polarizing microscopes used in the field of optical mineralogy. Olivine is known to crystallize in the [...]
The name Ruby was derived from the Latin word ruber, which means red. This is an allusion to the common color exhibited by the gem mineral. Ruby is a pink to blood-colored gemstone. It is most commonly found colored red, may be brownish, purplish or pinkish which can be more fascinating when viewed closely under [...]
Pearl is most commonly found white, silver, pink, cream, golden, green, blue or black be more interesting and fascinating when viewed closely under polarizing light microscope used in the field of optical mineralogy. Pearl is not showing any cleavage display even if it is closely evaluated using petrographic polarizing microscope used in the field of [...]
The name Topaz was derived from the Greek word for the ancient name of St. John’s Island in the Red Sea. Topaz is usually found clear if no impurities. It can be also found blue, brown, orange, gray, yellow, green, pink and reddish pink if closely evaluated with the aid of petrographic polarizing microscopes. It [...]
Quartz is usually found colorless through various colors to black. All of which are usually found interesting and fascinating under polarizing microscopes. It is known to crystallize in the trigonal system of crystal formation. The crystal habit of Quartz usually includes 6-sided prisms ending in 6-sided pyramid, drusy, fine-grained to microcrystalline and massive forms. These [...]
Opal is classified as a mineraloid. It is usually found deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock. Opal derived its name from the Latin word opalus. Opal is most commonly found white with amorphous crystals. The crystal habit of the mineral usually includes irregular [...]
The name of this gem mineral Diamond was derived from the Greek word adamas, which means unbreakable, proper or unalterable. Diamond is said to be one of the most sought after gemstones. The earliest referrence for the occurrence of diamond is said to be in India. Most diamonds used as gemstones are basically transparent with [...]
Emerald is most commonly found colored green which can be more interesting when viewed under polarizing microscopes. The crystal habit of the mineral is usually found massive to well crystalline structure. Emerald is known to crystallize in the hexagonal system of crystal formation. Emerald is commonly found showing imperfect cleavage in one direction when viewed [...]