IGI Diamond Clarity and Grading Quiz Weekly Test 01

Maccle has ______ effect

• Striations

• Fishbone

• Greasy

• Irregular itching

Answer explanation

Maccle is known to cause striations, which are linear marks or grooves on the skin. This distinguishes it from the other options, which do not accurately describe the effects associated with Maccle.

The second largest supplier of rough diamonds worldwide is

• South America

• Russia

• Africa

• Canada

Answer explanation

Russia is the second largest supplier of rough diamonds globally, following Botswana. It has significant diamond mining operations, making it a key player in the diamond industry.

Coated Diamonds are

• Semi transparent

• Opaque

• Translucent

Answer explanation

Coated diamonds are treated to enhance their appearance, making them opaque. Unlike semi-transparent or translucent materials, opaque substances do not allow light to pass through, which is characteristic of coated diamonds.

Two host rocks of diamonds are …….……………… and ………..…………….

A member who gets regular supply of rough from the mining company is also called as a ………………………..

The lustre of diamond is

• Metallic

• Waxy

• Adamantine

• Vitreous

Answer explanation

The lustre of diamond is classified as adamantine, which refers to its brilliant and reflective quality. This distinguishes it from other types of lustre like metallic or waxy.

Extra Facet is considered in ……………………………..

• Polish

• Blemishes

• Clarity

• None of the above

Answer explanation

Extra facets are considered blemishes in gemstones, as they can affect the overall appearance and value. Therefore, the correct answer is 'Blemishes'.

Burn Marks are considered for clarity grading if they are extensive and also block light.

• True

• False

Answer explanation

The statement is false because burn marks, even if extensive, do not qualify for clarity grading unless they are significant enough to block light. Therefore, not all burn marks are considered for grading.

The clarity call has to be given depending on the …………………. appearance of the inclusions

• Face Up

• Profile

• Pavilion

Answer explanation

The clarity call is based on the 'Face Up' appearance of inclusions, as this view shows how inclusions affect the overall look of the gemstone when viewed from the top, which is crucial for assessing clarity.

Indented Naturals can be found on …………………………….

• Rough Diamond crystal

• Maccle

• A Faceted Diamond

• Dodecahedron

Answer explanation

Indented Naturals are unique features found on a faceted diamond's surface, enhancing its brilliance. Other options like rough diamonds or maccles do not exhibit this characteristic.