Grain-oriented electrical steel sheet

A grain-oriented electrical steel sheet comprising:

• a base steel sheet;
• an amorphous oxide layer formed on the base steel sheet;
• and
• a tension-insulation coating formed on the amorphous oxide layer,
• wherein the base steel sheet contains, as a chemical composition, by mass %,
• C:
• 0.085% or less,
• Si:
• 0.80 to 7.00%,
• Mn:
• 1.50% or less,
• acid-soluble Al:
• 0.065% or less,
• S:
• 0.013% or less,
• Cu:
• 0 to 0.80%,
• N:
• 0 to 0.012%,
• P:
• 0 to 0.50%,
• Ni:
• 0 to 1.00%,
• Sn:
• 0 to 0.30%, and
• Sb:
• 0 to 0.30%,
• a remainder is Fe and an impurity,
• a surface glossiness Gs20(A) in a direction parallel to a rolling direction is 2.0 or more and less than 30.0, and a surface glossiness Gs20(B) in a direction perpendicular to the rolling direction is 2.0 or more and less than 30.0,
• wherein the amorphous oxide layer is an external oxidation-type layer in which some of an amorphous oxide intrudes into an interface between the steel sheet and the amorphous oxide and an aspect ratio is less than 1.2, and
• wherein the aspect ratio is represented by a ratio between the length of the intrusion portion in a depth direction and a length of a bottom side of the intrusion portion.