A ring gyroscope which comprises: - a substantially circular and flexible ring (92, 102) which defines a ring plane, and which is flexibly suspended from a substrate so that the ring (92, 102) can undergo shape oscillation in the ring plane, wherein the ring (92, 102) comprises first and second transversal symmetry axes (T 1, T 2) in the ring plane which are orthogonal to each other, and the ring (92, 102) also comprises first and second diagonal symmetry axes (D 1, D 2) in the ring plane which are orthogonal to each other, and the angle between each transversal symmetry axis (T 1, T 2) and the adjacent diagonal symmetry axis (D 1, D 2) is 45°, wherein the ring is a silicon ring; and - one or more primary piezoelectric split transducers configured to drive the ring (92, 102) into resonance oscillation, placed on first sectors of the ring (92, 102), and one or more secondary piezoelectric split transducers configured to sense the oscillation of the ring (92, 102), placed on one or more second sectors of the ring (92, 102), and each first sector crosses a transversal symmetry axis of the ring (92, 102) and is symmetric with respect to that symmetry axis, and each second sector crosses a diagonal symmetry axis of the ring (92, 102) and is symmetric with respect to that diagonal symmetry axis of the ring (92, 102) characterized in that the gyroscope further comprises: - 4N mobile mass elements (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133), where N is an integer greater than zero, wherein the mobile mass elements form a symmetrical mass distribution in relation to both the first and second transversal symmetry axes (T 1, T 2) and to the first and second diagonal symmetry axes (D 1, D 2), wherein each mass element (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133) is supported from the ring (92, 102) by a bridge connector (94, 1041, 1042, 1043), wherein the width of the bridge connector (94, 1041, 1042, 1043) along the ring periphery is substantially less than the width of the corresponding mass element (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133) along the ring periphery, but the bridge connector (94, 1041, 1042, 1043) is sufficiently wide to support the weight of the mass element (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133), and the bridge connectors (94, 1041, 1042, 1043) are evenly distributed along the ring (92, 102). - a substantially circular and flexible ring (92, 102) which defines a ring plane, and which is flexibly suspended from a substrate so that the ring (92, 102) can undergo shape oscillation in the ring plane, wherein the ring (92, 102) comprises first and second transversal symmetry axes (T 1, T 2) in the ring plane which are orthogonal to each other, and the ring (92, 102) also comprises first and second diagonal symmetry axes (D 1, D 2) in the ring plane which are orthogonal to each other, and the angle between each transversal symmetry axis (T 1, T 2) and the adjacent diagonal symmetry axis (D 1, D 2) is 45°, wherein the ring is a silicon ring; and - one or more primary piezoelectric split transducers configured to drive the ring (92, 102) into resonance oscillation, placed on first sectors of the ring (92, 102), and one or more secondary piezoelectric split transducers configured to sense the oscillation of the ring (92, 102), placed on one or more second sectors of the ring (92, 102), and each first sector crosses a transversal symmetry axis of the ring (92, 102) and is symmetric with respect to that symmetry axis, and each second sector crosses a diagonal symmetry axis of the ring (92, 102) and is symmetric with respect to that diagonal symmetry axis of the ring (92, 102) - 4N mobile mass elements (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133), where N is an integer greater than zero, wherein the mobile mass elements form a symmetrical mass distribution in relation to both the first and second transversal symmetry axes (T 1, T 2) and to the first and second diagonal symmetry axes (D 1, D 2), wherein each mass element (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133) is supported from the ring (92, 102) by a bridge connector (94, 1041, 1042, 1043), wherein the width of the bridge connector (94, 1041, 1042, 1043) along the ring periphery is substantially less than the width of the corresponding mass element (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133) along the ring periphery, but the bridge connector (94, 1041, 1042, 1043) is sufficiently wide to support the weight of the mass element (93, 931, 932, 1031, 1032, 1033, 10321-10324, 10331-10334, 1131, 1133), and the bridge connectors (94, 1041, 1042, 1043) are evenly distributed along the ring (92, 102).