If you are a first-time buyer of a loose opal gemstone online, then it could be confusing for you to opt for the best. You should be familiar with the basic categories in which opal gemstones can be divided. It includes Solid Opal, Treated, Synthetic, Doublets, and Triplets.

Khanna gems one of the best and Govt certified Gemstones dealers in banglore will let you know how to buy opals stone online for jewellery.

The next thing to consider is the rate of the brightness of opals on a scale from 1-5. A rating of 5 represents the highest brightness whilst a 3 rating represents the average brightness. For judging opal brightness,  use direct sunlight. If you are going to buy opal online, you should look for lines in the color flecks.

Opal's transparency describes how a beam of light penetrates the gemstone. Opaque stones, such as black stones, do not allow any light to pass through whereas translucent opal permits some amount of light to penetrate. On the other hand, transparent stones allow light to pass through them.

Outline of an opal describes the opal shape when one looks directly down at the face of the opal. The oval shape is the most desired, whilst a Freeform shape is quite common. The most attractive Freeform stones do not have sharp corners and have the fewest number of sides possible. Marquis shape or teardrop shape is another popular shape of opal.

The stone's origin is also important to be known. Knowing the stone's origin, a gem buyer can know about the stone online within a fraction of seconds. All the locations, where opal can be found, have their different styles to cut an opal stone. For an illustration, Lightning Ridge opal usually comes in a cut with a domed back. Opal stones can be found in many places across the world. Lightning Ridge is the most valuable, beautiful, and famous of all opal.