Gem DiamondsGMDMF Days Inventory is 155.49 as of Dec. 2025, which is 65% above its 10-year median of 94.05. The stock has 5 warning signs investors should review. Among 682 Metals & Mining companies, Gem Diamonds ranks worse than 77.57% on this metric.
Days Inventory is also known as Days Sales of Inventory (DSI). Gem Diamonds's Average Total Inventories for the
six
months ended in Dec. 2025 was $41.75 Mil. Gem Diamonds's Cost of Goods Sold for the
six
months ended in Dec. 2025 was $49.01 Mil.
Hence, Gem Diamonds's Days Inventory for the
six
months ended in Dec. 2025 was 155.49.
The historical rank and industry rank for Gem Diamonds's Days Inventory or its related term are showing as below:
GMDMF'
s Days Inventory Range Over the Past 10 Years
Min: 76.85 Med: 94.05 Max: 153.87
Current: 153.87
During the past 13 years, Gem Diamonds's highest Days Inventory was 153.87. The lowest was 76.85. And the median was 94.05.
GMDMF's Days Inventory is ranked worse than 77.57% of 682
companies
in the Metals & Mining industry
Industry Median: 86.01
vs GMDMF: 153.87
Gem Diamonds's Days Inventory
increased
from Dec. 2024 (110.18) to Dec. 2025 (155.49).
It might indicate that Gem Diamonds's sales slowed down.
Inventory Turnover measures how fast the company turns over its inventory within a year.
Gem Diamonds's Inventory Turnover for the
six
months ended in Dec. 2025 was 1.17.
Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
Gem Diamonds's Inventory-to-Revenue for the
six
months ended in Dec. 2025 was 0.79.
Gem Diamonds (OTCPK:GMDMF) Days Inventory Explanation
Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:
1. Inventory Turnover measures how fast the company turns over its inventory within a year.
Gem Diamonds's Inventory Turnover for the
six
months ended in Dec. 2025 is calculated as
2. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
Gem Diamonds's Inventory to Revenue for the
six
months ended in Dec. 2025 is calculated as
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Be Aware
A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.
Gem Diamonds Days Inventory Related Terms
Gem Diamonds Days Inventory Historical Data
* Premium members only.
The historical data trend for Gem Diamonds's Days Inventory can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
For the Other Precious Metals & Mining subindustry, Gem Diamonds's Days Inventory, along with its competitors' market caps and Days Inventory data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Gem Diamonds Days Inventory vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, Gem Diamonds's Days Inventory distribution charts can be found below:
* The bar in red indicates where Gem Diamonds's Days Inventory falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Gem Diamonds (GMDMF) has a Days Inventory of 155.49 as of Dec. 2025. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Gem Diamonds and its competitors. This is 65% above median its historical median of 94.05. Over the past decade, Gem Diamonds' Days Inventory has ranged from 76.85 to 153.87. According to the industry distribution chart, Gem Diamonds ranks #529 out of 682 companies in the Metals & Mining industry, placing it in the top 77.6%.
Is Gem Diamonds' Days Inventory too high?
Gem Diamonds' current Days Inventory of 155.49 is 65% above median its 10-year median of 94.05. Over the past 10 years, this metric has ranged from a low of 76.85 to a high of 153.87. The Metals & Mining industry median Days Inventory is 86.01. Gem Diamonds' value of 155.49 is 80.8% above this industry median. Based on the distribution chart, Gem Diamonds ranks #529 out of 682 companies in the Metals & Mining industry, which is in the bottom quartile relative to peers.
How does Gem Diamonds' Days Inventory compare to HL?
According to the Metals & Mining industry distribution chart, Gem Diamonds ranks #529 out of 682 companies for Days Inventory. This places Gem Diamonds in the lower half of its industry. The industry median Days Inventory is 86.01. Gem Diamonds' value of 155.49 is 80.8% above this benchmark. Historically, Gem Diamonds' own Days Inventory has ranged from 76.85 to 153.87 over the past decade. While the company's 10-year median is 94.05 vs. the industry median of 86.01, Gem Diamonds has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Days Inventory for a Metals & Mining company?
The median Days Inventory among Metals & Mining companies is 86.01, based on 682 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Gem Diamonds's current Days Inventory of 155.49 is 80.8% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Gem Diamonds and its competitors. For the Metals & Mining industry, the median Days Inventory is 86.01 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Gem Diamonds's current Days Inventory is 155.49, which is 65% above median its own 10-year median of 94.05. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Gem Diamonds stock overvalued right now?
Based on GuruFocus' analysis, Gem Diamonds (GMDMF) is currently considered Significantly Overvalued. The stock's GF Value™ is $0.03, compared to a current price of $0.04 — trading 43.8% above its estimated fair value. The current Days Inventory is 155.49, which is 65% above median its 10-year median of 94.05 and 80.8% above the Metals & Mining industry median of 86.01. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For Gem Diamonds (GMDMF), the current Days Inventory is 155.49 as of Dec. 2025. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Gem Diamonds Ltd is a United Kingdom-based company engaged in the exploration and development of diamond mines. The company's geographical segments include Lesotho (diamond mining activities); Belgium (sales, marketing, and manufacturing of diamonds); and BVI, RSA, the UK, and Cyprus (technical and administrative services) and Botswana (diamond mining activities, currently on care and maintenance). It generates maximum revenue from the Belgium region. Its projects include Letseng Diamond mine and Ghaghoo Diamond mine. The company's revenue is derived from mining activities, polished manufacturing margins, and diamond analysis and manufacturing services.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
GMDMF has been successfully added to your 