Symbolize peace, readiness, and bravery. While the people of Luna are peace-loving, they are ready to defend themselves in case of aggression. The shield has five (5) branches or figures which show that Luna then consisted of two district areas. Bisected by Apayao Abulog river it consisted of the northwest side and the southeast side, represented by the two bottom fingers. As years passed by, three municipalities were created out of the former territory of Luna, namely, Pudtol, Flora, and Sta. Marcela, each is represented by the three upper fingers, Flora and Sta. Marcela now occupies the former southeast side of Luna, while Pudtol and the mother town, Luna, are located at the northwest side of the river.

Being a precious metal, it represents the enormous natural wealth of Luna. The wide mountain is so rich in minor and major products, minerals, wildlife, clear, fertile agricultural land, and many others.

The native bolo represents the first inhabitants of Luna, a minority group called Isnegs (or Itnegs) and Aetas (pugot or aggay) but in much lesser number than Isneg. Until Ilocano immigrants poured in, the Isneg dominated the whole municipality. The aliwa is a sharp cutting instrument used chiefly by the Isneg at their residence or at the hillside farm. It is also used together with the spear for hunting and warfare. It is the status symbol of the Isnegs. Older folks or middle age Isneg always carry fasten at their waist an Aliwa anywhere they go, at peace or at war.

The spear is a reflection of the way of living of the first inhabitants of Luna, The Isnegs, and Aetas. The natives are expert hunters. Their main source of livelihood was hunting. They depend chiefly on wild animals and wild birds for a living. The spear is a very efficient instrument for hunting but is also used as an effective weapon against enemy attacks. Today, hunting becomes a sport of not only the natives but also the Ilocanos and other immigrants of the town.

The mountain symbolizes life’s stability. It is the main deposit of untapped natural wealth, major and minor forest products, minerals, wildlife, and many others. It is the lifeblood of Luna and adjoining towns of Cagayan. It provides irrigation water at the ricefield of two Province, Apayao and Cagayan. The territory of Luna consists of a wider mountainous and rolling area than lowland.

Symbolize self-sufficiency of agricultural foods. The wide ricefield supplies staple food of thousands if not million Filipinos. The straight and parallel earthen embankment of the paddies denotes that production is being mechanized to conform with the present trend of modern agricultural know-how.

(Where the logs are piled) denotes that wide forested agricultural land in the municipality awaits clearing and cultivation. Due to sparse population-wide areas are still alienable and disposable. The mountain, verdant rice paddies, and the vacant quadrant when viewed together represent the general topographic view of the municipality.

The 15 pieces of logs piled at the vacant quadrant represent the 15 barrios (now Barangay) and prominent sitios of Luna at the time of creation into municipal district. It included the barrios of the former southeast district (now the municipalities of Flora, Sta. Marcela, and Pudtol). Carrabao logging then was a secondary means of livelihood next to farming. Logs were gathered not at the mountain but right at their homestead while clearing. Hardwood whose stumps are still visible today were abundant at now the fertile ricefield of Luna.